164 articles trouvés pour ce sujet.
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800 poules pondent 800 oeufs en 8 jours |
2007-12-17 |
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LINDA pose la question :
800 POULES EN 8 JOURS PONDENT 800 OEUFS, COMBIEN 400 POULES
VONT-ELLES PONDENT D'OEUFS EN 4 JOURS?
Claude Tardif lui répond. |
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un jardinier plantent 10 arbres |
2007-09-30 |
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yannick pose la question :
un jardinier plantent 10 arbres.il a reussi a les disposer en formant 5 ligne de 4 arbres. retrouver une disposition possible
Claude Tardif lui répond. |
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exposant 0 |
2007-01-25 |
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Judith pose la question :
Je suis stagiaire dans une classe de sixième année et j'aimerais pouvoir expliquer à mes élèves pourquoi tous les nombres exposant 0 donne 1 comme réponse. ( 10 exposant zéro = 1) Merci!
Claude Tardif lui répond. |
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Un polyedre ayant comme face 20 triangles |
2000-08-02 |
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Sonia pose la question :
J'aimerai savoir comment s'appelle un polyedre ayant comme face 20 triangles équilatéraux égaux.
Chris Fisher lui répond. |
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Exposant à la 0 |
2000-07-04 |
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Sylvie pose la question :
J'aimerais savoir combien fait 0 exposant 0.
Claude Tardif lui répond. |
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0^(a+bi) |
2020-12-03 |
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Douglas pose la question :
I realize raising 0^a = 0 if a>0 and undefined if a<=0.
If have read that 0^bi is undefined for all b.
What I don't understand is why 0^(a+bi) = 0 if a and b are not equal to zero.
Is this purely by definition or is there a logical reason why this is the case?
(I have taken Complex Analysis, so have a fairly good understanding of complex numbers.)
Penny Nom lui répond. |
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1 square cm is 100 square mm |
2020-06-19 |
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macie pose la question :
explain why the conversion factor for cm squared to mm squared is 100 ,and not 10
Penny Nom lui répond. |
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A 50:1 ratio in a pint |
2020-05-22 |
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Steve pose la question :
How much oil do I need to put in a pint if it's 50:1 ratio
Harley Weston lui répond. |
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Is there an equation to find what percent of 0 is 1? |
2020-03-09 |
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Asher pose la question :
Question: Is there an equation to find what percent of 0 is 1.
I remember learning quite a long time ago that the answer inst 0 and it isn't infinity. I'm pretty sure it was something like %=0 approaching infinity or %=1 approaching infinity. And I know it depends what value you assign the numbers i.e. dollars or temperature. Furthermore, is asking "what percent 1 dollar is of 0 dollars" the same question as "what percent profit do you make from selling something worth 0 dollars for 1 dollar."
Thank you for your time and consideration
-Asher
Penny Nom lui répond. |
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30% profit |
2020-02-20 |
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Sidra pose la question :
A car dealer bought a car for £7500 and sold it for 30% profit.
For how much did he sell the car?
Penny Nom lui répond. |
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Arranging 10 digits |
2019-10-09 |
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Laxmi pose la question :
1)The integers 0 to 9 are arranged along a straight line in some order.a) find a possible arrangement in which the sum of any three adjacent numbers is less than 15.b)is there an arrangement of this kind 0 is not included in the numbers.
Penny Nom lui répond. |
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400 in 7.5 billion |
2019-08-28 |
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Emma pose la question :
What is a better way to express 400 in 7.5 billion?
My daughter has a rare condition, I want to know the answer to say “she is 1 in a ...”
Penny Nom lui répond. |
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Six digit numbers from 4 digits |
2019-07-30 |
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Tab pose la question :
How many six digit combinations can be made from the numbers zero, two, five, eight? With repetition of numbers
Penny Nom lui répond. |
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One part in 10^x |
2019-06-26 |
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Jim pose la question :
What is the meaning of the phrase ‘one part in 10x” where the x is an exponent? I have seen these examples: “...better than one part in 10x” and “...to within one part in 10x.”
Penny Nom lui répond. |
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The perimeter of 200 acres |
2019-06-14 |
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AARON pose la question :
How many feet is the perimeter of 200 acres?
Penny Nom lui répond. |
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An 80 acre square |
2019-05-11 |
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Linda pose la question :
How long and wide is an 80-acre piece of land that is square?
How long and wide is a 160-acre piece of land that is square?
Penny Nom lui répond. |
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Four multiples of 10 |
2017-09-23 |
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Laudacir pose la question :
Four multiples of 10 are added together.the total is a 3 digit number with three consecutive digits. What could the four number be?
Penny Nom lui répond. |
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A 4 sided lot |
2017-08-15 |
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Micheal pose la question :
If one side of .4 acre is 25 feet what would the other three sides be
Penny Nom lui répond. |
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Factorials |
2017-07-27 |
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dinesh pose la question :
Is there any shortcut formula for multiply series numbers.
like
1x2x3x4x5.......x100 =?
Penny Nom lui répond. |
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A 40 acre square |
2017-05-14 |
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Richard pose la question :
How many feet on each side of 40 acre square ?
Penny Nom lui répond. |
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A circle inscribed in a 30-6-90 triangle |
2017-04-07 |
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Kameron pose la question :
i have been given a problem with a 30-60-90 triangle and a circle inscribed with a radius of 2 and was told to find the perimeter of the triangle
Penny Nom lui répond. |
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2^a, 2^b, 1^1 and 1^0 |
2017-03-17 |
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Émile pose la question :
If you had 2^a = 4 and 2^b = 4 you could assume that a = b right? Yet we can observe that 1^1 and 1^0 both equal 1, yet 1 = 0 isn't true. So if given a log base 1 number 1 the would the answer be 1 AND 0?
Penny Nom lui répond. |
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980 cubic yards of dirt |
2016-12-17 |
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Jondi pose la question :
I am trying to visualize 980 cubic yards of dirt by using a metaphor.
Would this be the size of a car?
A fire engine?
A semi-trailer?
How many trucks would you need to haul away 980 yards of dirt?
Penny Nom lui répond. |
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y = mx + c and Ax + By + C = 0 |
2016-10-18 |
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Erick pose la question :
please explain to me how to convert an equation from the form y=mx+c to Ax+By+C=o form.
Penny Nom lui répond. |
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The diagonal of a 10 acre square |
2016-04-11 |
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Derrick pose la question :
I own 100 acre square of land. I want to run from farthest corner of property to farthest corner, Diagonally. How many miles would I have traveled?
Penny Nom lui répond. |
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20 mangoes |
2016-04-01 |
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Mussharat pose la question :
I have 20 mangoes and have to put them in 5 boxes such that
the numbers will be odd numbers.Also I can't cut or take the seed
out from the mango . What should I do. It's really confusing.
I'll be more than happy if you could help me.
Penny Nom lui répond. |
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0/0 |
2016-02-14 |
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Noni pose la question :
Q. 0÷0=1 Why it is wrong when 4÷4=1; 3÷3=1; 2÷2=1: 1÷1=1 ?
Penny Nom lui répond. |
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20 golfers playing a 20 week season |
2015-12-07 |
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Jeff pose la question :
We have 20 golfers playing a 20 week season. We play in foursomes. How best to set foursomes so everyone can play with every without playing with the same person multiple times?
Victoria West lui répond. |
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A six team league to play a 20 game schedule |
2015-10-19 |
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Kelly pose la question :
Hi there. Some of your posts are close, but my problem is evening out the home
and away games. We have 6 teams in our league and we are going to play a 20
game schedule, playing everyone 4 times. We will play Fridays and Saturdays,
each weekend. Of course the ideal would be to have each team have a home and
an away game each weekend, but I realize that is impossible, but I would like it as
close as possible. Any help would be much appreciated!! We also were considering
opening with a home and away - Friday then Saturday with the same teams. Then
carrying on with playing everyone else and then possibly finishing up with the same
home and home
Victoria West lui répond. |
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How can the probability be zero? |
2015-10-13 |
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anagha pose la question :
Hi,
thank you for answering (beforehand)
The other day I was just thinking of circles and I came across this peculiar thing.
Most of'em say that there are infinite number of points on the circumference.
and, if it is true, if we spin the radius, the probability that it will point a a particular point is 1/infinity, right?
It didn't make any sense to me and so, I thought there might be an explanation or something of the kind...?
Harley Weston lui répond. |
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Mathematics |
2015-10-13 |
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anagha pose la question :
Hi,
thank you for answering (beforehand)
The other day I was just thinking of circles and I came across this peculiar thing.
Most of'em say that there are infinite number of points on the circumference.
and, if it is true, if we spin the radius, the probability that it will point a a particular point is 1/infinity, right?
It didn't make any sense to me and so, I thought there might be an explanation or something of the kind...?
Harley Weston lui répond. |
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20 golfers for 6 days |
2015-09-11 |
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Dave pose la question :
have 20 golfers for 6 days. Each player should pair with 18 golfers
used a system on your website which is good for 5 days, but cannot get the 6th day.
Thanks for your help Dave
Victoria West lui répond. |
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20 golfers playing four rounds |
2015-08-17 |
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Paul pose la question :
I have a party of 20 golfers playing four rounds in fourballs.
I realise that everyone will have 7 players that they do not play
with, however I want to ensure that no one plays with the same
person twice and that the Captain plays with the 12 players of
his choice.
Victoria West lui répond. |
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n^2 is a multiple of 100 |
2015-03-30 |
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Rahul pose la question :
I have to prove that n^2 is a multiple of 100 is necessary or
Sufficient condition (or both) for n being multiple of 10
Penny Nom lui répond. |
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What is 1000 billion billion? |
2015-03-10 |
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LeRoy pose la question :
what does this mean? 1000 billion billion
Penny Nom lui répond. |
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How many square feet in 10 gallons of liquid at 1/4 in thick? |
2014-11-14 |
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Rich pose la question :
How many square feet in 10 gallons of liquid at 1/4 in thick
Penny Nom lui répond. |
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A 10-foot piece of PVC pipe |
2014-10-21 |
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David pose la question :
A plumber has a 10-foot piece of PVC pipe. How many 9/5-foot pieces can be cut from the 10-foot piece ?
Penny Nom lui répond. |
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211(base x)=152(base 8) |
2014-09-09 |
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Vaidehi pose la question :
Find the base value (i.e. x):
211(base x)=152(base 8)
Penny Nom lui répond. |
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Golf for 10 |
2014-08-12 |
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Fred pose la question :
We have 10 golfers playing 4 rounds: one 4-some and two 3-somes each round.
Can you suggest the best distribution of players?
Victoria West lui répond. |
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20 teams and 10 competition stations |
2014-06-04 |
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Joel pose la question :
I have 20 teams. There are 10 competition stations.
Each station will accommodate exactly 2 teams to compete with each other at a time.
Each of the 20 teams needs to compete at each of the 10 stations exactly one time.
Here's the catch I cannot solve: how to schedule it so that each team plays EVERY OTHER TEAM once and only once, while never repeating a station.
Victoria West lui répond. |
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10 golfers, playing 7 rounds in 2 x 3balls and 1 x 4ball |
2014-06-04 |
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adrian pose la question :
Hi,
We are off to Scotland on our yearly golfing trip soon.
Question is we have 10 golfers, playing 7 rounds in 2 x 3balls and 1 x 4ball.
I would like to ensure that each golfer plays with the other guys an equal amount of times,
guess 3ish? and we share the amount of times each player plays in the 4ball.
Hope you can help?
Victoria West lui répond. |
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The combination of 6 numbers from 1 to 355 that gives us 360 |
2014-05-29 |
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Ion pose la question :
Hi,
My name is Ion and I am trying to find the number of combinations of 6 numbers (angles) that would sum to 360 (degrees).
Thank you!
Robert Dawson lui répond. |
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A schedule for 2 teams of 10 |
2014-05-07 |
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John pose la question :
How can I set up a schedule for 2 teams of 10 on a team to play each individually against each other over a 10 day span at 10 different course with 10 different start times each day. I was looking to not repeat any competition. As an example, Team A would consist of players 1-10, Team B would consist of players 11-20. I would want to have 10 start times a day for 10 days where a member of team A plays a member of team B each day without repeating any matches and any of the same courses and not repeating any of the same start times. Any help in this would be GREATLY appreciated!!!!
Victoria West lui répond. |
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Golf with 3 teams of 20 |
2014-04-21 |
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Joshua pose la question :
Thank in advance for this great service
Golf - new - 3 teams of 20 - to create 20 unique groups of 3
For example use 3 teams of 3
1a 2a 3a
1b 2b 3b
1c 2c 3c
So groups are
1a 1b 1c
2a 2b 2c
3a 3b 3c
Groups can only have one a, one and one c - and that combo should be unique
Victoria West lui répond. |
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A golf league with 20 players over 17 weeks |
2014-04-12 |
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Chris pose la question :
I have a golf league 20 players and 17 weeks. We don't have teams so I just want to have everyone to play with each other the about same number of time and, hopefully, randomly distributed throughout the season. We have had situations in the past where two people play together for three weeks in a row and then not anymore for the rest of the season. From other posts, I see how to schedule the first 5 weeks without repeats but I can’t figure out an algorithm to for the rest of the season. Thanks!
Victoria West lui répond. |
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Golf with 20 players and one compulsory bye |
2014-03-31 |
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Wayne pose la question :
I'm trying to run an event with 20 players, I would like if at all possible to limit amount of people playing repetitively together. (Mix it up and play with different people). Here's the conditions. I want groups of 4 over 5 rounds. On each round I want 4 players to drop out and have a bye (to help run the game) but I dont want them helping a group they've played in if I can help it. Is this possible ?
Victoria West lui répond. |
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Counting in base five using words not digits |
2014-01-25 |
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Randy pose la question :
We all know how to count (in the base 10/decimal system) using words not numbers. For example: one, two, three, four, five, six, seven, eight, etc. However, in base 5 (for example) how would you count (in words). For sure - in base 5 the number 1 could be "one", the number 2 could be "two". However there seems to be no words to describe base 5 numbers beyond 0,1,2,3 and 4 (and perhaps 10). In base 5 the number 10 is not ten. Rather it is "five". In base 5 what word(s) describe numbers larger than 10? What words are used for 11, 12, 13, 14, 20, 21, 22, 23, 24, 30, 44,...etc. Also, consider a man and woman were married in the Gregorian year 1964. If they had an anniversary tomorrow - how long would you say they've been married in base 5 speak? In numbers their Golden Anniversary would note 200 years of marriage in base 5. How would you articulate their years together in base 5? I don't recall seeing verbiage to represent numbers in any system other than the decimal/base 10 system. Do such things exist for other systems?
Harley Weston lui répond. |
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Scheduling 10 people for 5 rounds |
2013-11-20 |
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Keith pose la question :
Using golf as an example, I would like to schedule 10 people for 5 rounds with 2 groups of 4 and 1 twosome each round. I would like to minimze the number of times any one player plays with another. Can you provide an optimal schedule? Thank you for your help.
Victoria West lui répond. |
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8 numbers from 80 |
2013-09-04 |
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susan pose la question :
Out of 80 numbers how many combinations of 8 are there and what are they.
Penny Nom lui répond. |
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More than half of the people said... |
2013-08-26 |
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Lucy pose la question :
Hi,
The question is:
Samoa 23%
Brazil 41%
Sri Lanka 52%
Senegal 39%
Armenia 37%
Croatia 20%
Why is the following statement true for the data above: More than half of the people said they were interested in Sri Lanka. The reason I don't understand the problem is that because the percentages add up to be greater than 100%, that means that the 500 people(as stated in the question) who participated in the survey got to pick more than once. Therefore, it is not 52% out of 100% anymore.
Thanks for taking the time to answer my question.
Robert Dawson lui répond. |
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10 guys playing 8-9 hole rounds |
2013-07-19 |
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Jason pose la question :
I have 10 guys playing 8 9 hole match-play rounds. I need to have everybody play the other 9 men, but need to limit them to only a 9 hole match between them. If we need to go 3-3-4 or 2-4-4 for a better solution, that may be possible.
Victoria West lui répond. |
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20 golfers over 5 days |
2013-05-09 |
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Russ pose la question :
we have 20 golfers over 5 days, with 4 people per foursome which makes 5 groups each day. I would like to each person to play with everyone at least once if possible. Do you have a formula for this?
Victoria West lui répond. |
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10 golfers playing four rounds |
2013-04-09 |
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Terry pose la question :
I've searched "golf" and "golf 10" but don't see 10 golfers playing four rounds (each round having one foursome plus two threesomes, and no "flights" as in one earlier answer); each player playing at least once with a maximum number of the other nine over the four rounds?
Victoria West lui répond. |
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100 animals |
2013-02-25 |
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Jessica pose la question :
You have exactly $100.00 to spend. You must get 100 animals.
The chicks cost $0.10 each.
The pigs cost $2.00 each.
The sheep cost $5.00 each.
You must get some of each animal.
How many of each animal can you get?
Penny Nom lui répond. |
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We have 10 golfers and four rounds of golf in two days |
2013-02-05 |
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Steve pose la question :
We are having a golf tournament. We have 10 golfers and four rounds of golf in two days. We are going to break the group of 10 into two flights. Flight A and Flight B. We would like all members in Flight A to play one nine hole match against each other. All players in Flight B to play one nine hole match against each other. Could we play in groups of 4,3 and 3? What is the best way to make the pairings work?
Robert Dawson lui répond. |
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Golf for 20, two teams of 10 |
2012-08-30 |
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Mark pose la question :
Hi
I have to teams of 10 people playing Ryder cup format(against each other)
Can I have all 20 people playing with someone different over 3rounds of golf while remaining on there respective team I.e. players 1 to 10 must team up with a player of that group against a pair for players 11 to 20
I hope you can solve this for me
Thanks a bunch Mark
Victoria West lui répond. |
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Expanded exponential form? |
2012-06-12 |
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Ramon pose la question :
express the numbers 990 614 000 005 in expanded exponential form.
Harley Weston lui répond. |
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Golf for 10 |
2012-04-18 |
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Bob pose la question :
Question from Bob:
Hi,
I am trying to set up pairings for 4 rounds of golf with only 10 golfers (2 foursomes and 1 twosome) and trying to minimize duplications. Any formulas or help?
Victoria West and Harley Weston lui répond. |
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240 acres |
2012-02-17 |
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jon pose la question :
How many linear feet are in a 240 acre rectangle piece of property
Harley Weston lui répond. |
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Expressing 0.5% |
2012-02-06 |
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Kenneth pose la question :
Hello:
It is correct to express 0.5% as 5 tenths of one percent.
Is it also correct to express 0.5% as 5 tenths of one-hundred percentage points or 5 tenths of one percentage point?
I think it would be 5 tenths of one percentage point because 5 tenths of one-hundred percentage points would be 50 percentage points, but I'm not sure.
I thank you for your reply.
Penny Nom lui répond. |
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Converting from base 4 to base 10 |
2011-11-29 |
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anjg pose la question :
How to convert base 4 number 2^11 to base 10 number?
Penny Nom lui répond. |
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1 divided by 0 and infinity |
2011-10-24 |
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ritika pose la question :
we say that one divided by zero gives us infinity, then why zero multiplied by infinity does not gives us one?????????????
Robert Dawson lui répond. |
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Expanded form |
2011-10-12 |
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Chris pose la question :
Write this number in expanded form
4 326 180 501
Thanks!!!
Penny Nom lui répond. |
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A group of 40 golfers |
2011-07-11 |
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Doug pose la question :
We are a group of 40 golfers who play in 10 x foursomes playing 3 rounds. Can we all play with different players each round yet maintain the foursomes format.
Victoria West lui répond. |
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Construct a 30 degree angle |
2011-06-10 |
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Ella pose la question :
they give you a simple straight line and ask you to construct an angle of 30 degrees at one end of the line using only a ruler and a compass?
Penny Nom lui répond. |
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Arrangements of ten letters |
2011-04-15 |
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Mustafa pose la question :
In how many ways can the ten letters of the word GELATINOUS be arranged
in a line so that the vowels are in alphabetical order (not necessarily together)
when read from left to right?
Penny Nom lui répond. |
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A golf league of 60 golfers |
2011-04-14 |
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Keith pose la question :
I have a golf league of 60 golfers and I want to have each golfer play in a different group of 4 each week for 24 weeks.
How can I do this
Victoria West lui répond. |
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What is x to the power of 0? |
2011-03-23 |
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Jason pose la question :
What is x to the power of 0?
Robert Dawson lui répond. |
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20 acres, 12 inches deep |
2011-02-24 |
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David pose la question :
How many linear yards of material is needed for a square plot of 20 acres by 12 inches deep?
Penny Nom lui répond. |
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1/0 and 2/0 |
2011-02-11 |
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Dixit pose la question :
How are the infinite number obtained by dividing 1 / 0 and 2 / 0 are different?
Penny Nom lui répond. |
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10 golfer playing 5 rounds |
2011-01-09 |
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Jeff pose la question :
need pairing for 10 golfer playing 5 rounds of golf.
Victoria West lui répond. |
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The new diameter is 50 per cent larger than the original. |
2010-09-04 |
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mahwish pose la question :
. A circular logo is enlarged to fit the lid of a jar. The new diameter is 50 per cent larger than the original. By what percentage has the area of the logo increased?
Tyler Wood lui répond. |
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Does 1= 0.9999....? |
2010-04-07 |
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Asia pose la question :
Does 1= 0.9999....? There seems to be different opinions on this.
Robert Dawson lui répond. |
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The sides of a 30-60-90 triangle |
2010-03-29 |
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maris pose la question :
Find the sides of a 30-60-90 triangle whose perimeter is 6. The solution must use systems of equations using 3 variables.
Penny Nom lui répond. |
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An isosceles triangle |
2010-02-11 |
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Kim pose la question :
I am given the length of the two legs of an isosceles triangle (8), and the base angles are 30 degrees...I am asked to find the area of the triangle with only this information
Tyler Wood lui répond. |
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A cylinder is cut at an angle of 20 degrees |
2010-01-25 |
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sanjay pose la question :
If I have a cylinder with 40mm diameter and I will cut it at an angle
20 degrees so what would be the increased radius or dia.??? of the cylinder
Penny Nom lui répond. |
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Bases larger than ten |
2009-12-14 |
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Nick pose la question :
For numbers in bases larger than ten, what are the digits by mathematicians' conventions?
I assume the first 10 are always 0-9. I know two computer science conventions (for hexadecimal (A-F case-insensitively) and for base 85 (case-sensitivity plus 23 other characters)) and as a school student I learned that base 12 uses either T and E (which confused me when I thought they stood for Eleven and Twelve) or A and B, the latter as capitals only. Clearly, these conventions are in conflict.
I saw your reply in http://mathcentral.uregina.ca/QQ/database/QQ.09.99/magin1.html as accessed a few minutes ago but hope that in the 10 years since then mathematicians have arrived at a convention. Have they?
Thank you.
--
Nick
Claude Tardif lui répond. |
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10 golfers |
2009-09-06 |
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Bill pose la question :
We have 10 golfers scheduled to play over five days on vacation in November. Each day we will play in three groups of three and one foursome.
Is there an optimum solution that would assure that every golfer plays with every other golfer at least once while no golfer plays an inordinate number
of times with any other golfer or too often in a foursome?
Victoria West lui répond. |
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30 students |
2009-08-06 |
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Peter pose la question :
Question from Peter, a student:
Can you please help with the following questions?
(a) It is known that among any group of the three students in a class two of them are friends. Total number of students is 25. Prove that there is a student who has at least 12 friends.
(b) There are 30 students in a class. They sit at 15 double desks, each one is for two students. Half of the girls sit with boys. Is it possible to make a rearrangement so that half of the boys sit with girls?
Penny Nom lui répond. |
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The sum of the angles of a triangle |
2009-05-18 |
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mary pose la question :
prove that the sum of the three angles inside any triangle always add up to 180 degrees?
Harley Weston lui répond. |
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0123456789 |
2009-03-25 |
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Dr. pose la question :
Many years ago I discovered that there are 33 numbers which,
when multiplied by 0123456789, simply rearrange the digits. Surprisingly
(to me at least) is the fact that the digits of all of those 33 numbers add up
to one of the 6 "cardinal" numbers 1, 2, 4, 5, 7, and 8. For example
6 + 2 = 8 and 62 X 0123456789 = 7654320918 etc.
Another interesting (to me) fact is that only the cardinal numbers
1, 2, 4, 5, 7, and 8 rearrange the digits in the number 9876543210.
My question is: "Is this known to anyone but me and the people I have
told?"
Robert Dawson lui répond. |
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A shape with 10 sides |
2009-03-03 |
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Sandra pose la question :
One of my son's math questions is as follows:
Suppose I have a shape with 10 sides. I choose a vertex then draw lines to the other vertices that dont share sides with the first vertex. How many vertices will that be and why?
Penny Nom lui répond. |
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0/0 and 1/0 |
2009-02-16 |
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Justin pose la question :
I was just wondering which is bigger 0/0 or 1/0?
Justin
Robert Dawson and Harley Weston lui répond. |
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0/0 |
2009-02-15 |
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Justin pose la question :
Hello, I was just wondering, what is the difference between 0/0 being represented as nullity or as an indeterminate form?
Justin
Harley Weston lui répond. |
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A 30-60-90 triangle |
2009-02-03 |
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Inez pose la question :
If you have a 30-60-90 triangle and the only side you get is 73 and a 90 degree box, how do you find the area?
Penny Nom lui répond. |
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20 of us golf together in groups of 4 |
2009-01-24 |
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D. pose la question :
Every Sunday, 20 of us golf together in groups of 4. I am looking for a
way that each of us play with 3 other people each week and ultimately get
to play in groups that are unique. For instance if week 1, I play with 2, 3, 4
and then the next week I play with 5, 6, 7, and the 3rd week I play with 8,
9, 10 and so forth until I have played with everyone. Everbody else should be
doing the same thing. Can you give me a schedule for this and how many weeks
would it take for all of us to accomplish this where we all play with different
combinations of people. (We should not play with the same person very often or even
the same pairs of people but everyone should play with everybody else) I hope
this makes sense........whew and thanks!
Victoria West lui répond. |
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What is one trillion divided by 10? |
2008-12-09 |
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mark pose la question :
can you please tell me what one trillion divided by 10 is
Robert Dawson and Penny Nom lui répond. |
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0.99999.... |
2008-09-23 |
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Eve pose la question :
Hi, i had a problem with change 0.99999... this recurring decimal to a fraction. I know the method, but the answer I got is 1 as you can see below.
Where have i done wrong?
Harley Weston lui répond. |
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Aboriginal number groupings |
2008-09-04 |
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Barbara pose la question :
Our current place value system is based on the notion of 10s. Did Aborginal people use a similar system or did they group numbers differently?
Harley Weston lui répond. |
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20 golfers playing 5 rounds in 4-somes |
2008-09-03 |
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joe pose la question :
20 golfers playing 5 rounds in 4-somes. 5 players in group A play with all 15 golfers in groups B,C,D but not with any in their own group (A).
5 players in group B play with all 15 players in groups A,C,D but not with any in their own group (B) and so on. So each 4-some has an A,B,C,&D player each of the 5 rounds.
Chris Fisher lui répond. |
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A 10 acre square |
2008-05-12 |
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RICHARD pose la question :
I AM GETTING A 10 ACRE TRACT OF LAND OUT OF A 50 ACRE TRACT. ITS GOING TO BE PERFECTLY SQUARE.I NEED TO KNOW WHAT EACH PROPERTY LINE LENGTH WILL BE?ON ALL FOUR SIDES.AND THE TOTAL SQUARE FEET WILL BE IN THIS 10 ACRE TRACT?
Penny Nom lui répond. |
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Zero divided by infinity |
2008-05-03 |
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ANNE pose la question :
There was a question about what do you get when you divide Zero by infinity. There was an example using Potatoes. Could someone please explain a little bit more in detail, so that I can help my son who has Schizophrenia understand. He is big into Mathematics and is consumed by this question.
Thankyou so much,
Anne
Penny Nom lui répond. |
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Division by zero |
2008-05-01 |
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Bill pose la question :
Why does multiplication have a favored status so as to make division by zero undefined?
Harley Weston lui répond. |
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A 30-60-90 triangle |
2008-04-16 |
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Ron pose la question :
30-60-90 triangle. Base is 2.75 how do I find the length of the other two sides?
Penny Nom lui répond. |
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A 100 acre square pasture |
2008-04-03 |
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Richard pose la question :
I need to know how many lineal feet there is around a 100 acre pasture that is square in shape. I am no longer able to get out and measure it myself, and cannot remember the math to compute it.
Penny Nom lui répond. |
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Twenty golfers |
2008-03-16 |
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john pose la question :
I have a group of 20 golfers. We plan on playing 6 rounds of golf in 4 days. I would like to have the most possible combinations of players without each player playing with anyone if possible, in the 4 days of golf
Victoria West lui répond. |
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The product of two numbers is 1,000,000,000 |
2008-03-14 |
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Henry pose la question :
What two numbers that don't in zero when multiplied equals 1,000,000,000 and same with 1,000,000,000,000,000,000.
Penny Nom lui répond. |
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Choosing 10 numbers from 40 numbers |
2008-01-18 |
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Antwan pose la question :
I have 40 numbers........number 1-40.
I want to know how many times i can chose 10 of those numbers without picking the same exact sequence twice if its even possible?
Stephen La Rocque lui répond. |
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Multiplying numbers in bases other than 10 |
2008-01-08 |
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Imaiya pose la question :
In class we've been learning about numbers with a base other than ten. For example, base 7, base 5,
and base 6. What's really stumping me is how to multiply these numbers, when they aren't a base of 10.
I've had it explained to me once, but don't seem to understand it. Here are the equations, and I've listed the first few numbers for that particular base.
Base 5: 0,1,2,3,4,10,11,12,13,14,20 etc... The Equation: 34 x 42
Base 9: 1,2,3,4,5,6,7,8,10,11,12,13,14, etc... The Equation: 56 x 78
If you could explain to me how to multiply numbers with any type of base, I'd really appreaciate it. Also
if you could show me how to do one of the questions that I listed, that would really help me =) Thanks so much,
and once again, thank you for your great site!
Stephen La Rocque lui répond. |
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Base 10 to base 5 |
2007-10-09 |
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Angela pose la question :
I've been searching online for the past week and I cannot find an Algorithm to convert from base 10 to base 5. Can anyone give me a step-by-step instruction on how to do this?
Stephen La Rocque lui répond. |
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Golf pairings |
2007-10-02 |
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Mike pose la question :
Regarding arranging golf players so no person plays with anyone more than once.
You have given examples for 16 and 24 players. If it can be done, i need a
solution for 20 players, 4 players per team one round per day for 5 days
Victoria West lui répond. |
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If A is 1 and Z is 26 |
2007-06-29 |
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Sue pose la question :
If A is 1 and Z is 26 is there a word that when you multiply all the numbers instead of letters adds up to a million?
Chris Fisher and Harley Weston lui répond. |
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How can we explain to middle school students that 0^0=1? |
2006-10-15 |
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Peter pose la question :
How can we explain to middle school students that 0^0=1?
Steve La Rocque, Penny Nom, Claude Tardif and Harley Weston lui répond. |
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a _________________ line forms a 90 degree angle with another line |
2006-09-24 |
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Lisa pose la question :
a _________________ line forms a 90 degree angle with another line is this to it
what fills in the blank? first letter is E third letter is R and has 13 letters
Stephen La Rocque lui répond. |
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A base number raised to the power of 0 |
2006-08-24 |
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Sheila pose la question :
I'm a 5th grade teacher and need some help with a base number raised to the power of 0 always being 1. My kids asked me why and I told them I'd find out.
Penny Nom lui répond. |
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Twenty golfers |
2006-05-08 |
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Mona pose la question :
We have twenty golfers and four rounds of golf. We would like to figure out how to make foursomes so that each golfer plays with as many different golfers as possible.
Penny Nom lui répond. |
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Interest computed on a 360 per year basis |
2006-04-06 |
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Sonya pose la question :
Okay, I am reading this promissory note that says interest is computed on 365/360 basis by applying the ratio of annual interest rate (24%) over a year of 360 days.
I sure do not remember anything like this in school, and am stumped.
Stephen La Rocque lui répond. |
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A triangle of 50p pieces |
2006-02-22 |
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Stuart pose la question :
Ok, so i am collecting 50p pieces and arranging them on my desk in the shape of a triangle.
eg
50p
50p 50p
50p 50p 50p
50p 50p 50p 50p
I want to work out how much money I'm saving just by knowing how many rows of coins there are. If i can work out how many coins there are just by knowing how many rows I have I can just divide by 2 to find out the amount in dollars.
Penny Nom lui répond. |
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Is a zero considered an even or odd number? |
2005-12-13 |
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Sylvia pose la question :
Is a zero considered an even or odd number?
Penny Nom lui répond. |
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A 30-60-90 triangle |
2005-09-11 |
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Gary pose la question :
I have the length of only 1 side of triangle with angles of 30-60-90 degrees. How can I find the length of the other 2 sides?
Penny Nom lui répond. |
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0.999..., asymptotes and infinity |
2004-12-17 |
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Mike pose la question :
My Name is Mike and I teach high school. I had a student ask me to explain why .9 repeating is equal to 1. Then he asked me about an asymptote, or why a parabola or any other curve for that matter can continually approach a value (like 1) and yet never attain a value of 1. He is thinking that these two should represent the same concept and yet they contradict each other. Do you have a solid explanation for him? Of by the way he is a 7th grader. Great little thinker!!!!!
Claude Tardif and Harley Weston lui répond. |
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A 30-60-90 triangle |
2004-11-09 |
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Amy pose la question :
How do you find the length of the hypotenuse of a 30-60-90 triangle when the side opposite the 60 degree angle is 6 inches?
Penny Nom lui répond. |
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20 Golfers |
2004-10-26 |
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Ian pose la question :
I have 20 golfers playing over 6 days I would like to schedule all 20 golfers in 5 groups of 4 on each day here is the catch.... I would like each player to play with each other once during the 6 days.
Chris Fisher lui répond. |
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Zero to the zero |
2004-09-18 |
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Greta pose la question :
My name is Greta, and I am a 7th grader and my test is coming up. The question I would like to ask you is why 0 elevated to 0 is unidentified.
Penny lui répond. |
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The "22" puzzle and the "1089" puzzle |
2004-04-22 |
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Marcelle pose la question :
1. Choose 3 digits from 1-9
2. Make all the 2 digit numbers you can from these (6)
3. Add the 3 original digits and divide them into the sum from step 2.
The answer is always '22'. I just can't understand why. Can you please help.
Another one related to this is it:
1. Choose a three digit number ensuring the first and third digit are differnt by at least two.
2. Make the reverse three digit number and subtract the smaller one from the larger of these.
3. Take this answer and reverse it and add these two 3 digit numbers .
eg:
643 - 346 = 297
297 + 792 = 1089
it doesn't matter what numbers are used, the results are alwasy the same. eg 22 or 1089
Paul Betts lui répond. |
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Zero |
2004-02-12 |
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Syazwan pose la question :
can you tell me who and when the number zero was
discoveredd
Penny Nom lui répond. |
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1/0 = ?? |
2003-12-09 |
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Lisa pose la question :
One of my students asked me a fractions question. She knows that 0/1
equals 0 but does 1/0 also equal 0?
Walter Whiteley and Penny Nom lui répond. |
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10,000 |
2003-10-08 |
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Nathan pose la question :
what two numbers make the product of 10,000. Neither number can end in a zero
Penny Nom lui répond. |
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0/0 |
2003-09-25 |
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Thomas pose la question :
How is 0/0 ever defined.
Penny Nom lui répond. |
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Converting from base 10 to base 5 |
2003-09-10 |
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Susy pose la question :
My son, who is 9 in grade 5 has been asked to convert base 10 numerals into base 5. His first question of: 24(10) he has calculated to be 4x5 + 4x1 = 44 (5) The next question however is the tricky one.Ý We know the answer is supposed to be 100 but we find it difficult to get this in the way he understands it. 25 (10) = _________________ 100 (5) Can you help us figure out how we reach the answer.
Claude Tardif and Penny Nom lui répond. |
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Positive, negative and zero |
2003-09-04 |
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Brian pose la question :
Can the Value of zero be positive or can it be negative or can it be both.
Penny Nom lui répond. |
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Converting to base 10 |
2003-08-28 |
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Karen pose la question :
My son is in 5th grade.Ý He is learning how to convert numbers from base 2 to base 10, and base 5 to base 10.Ý Can you explain it to me in the simplest terms?
Penny Nom lui répond. |
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Division by zero |
2003-01-19 |
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David pose la question :
I've been to your site and am interested on the subject of division by 0. It's easy enough to give answers, but it's very hard, especially in this case, to make someone understand a mathematical problem. It's been about a year since my Calc class, and we never went over division by 0, only infinite numbers and such. My question is: How would you work a problem of (real number) / 0 ? As ignorant as it may sound to you, I am having trouble grasping this since I've only begun to understand some of it. Perhaps you could help.
Harley Weston lui répond. |
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Exponent 0 |
2002-10-02 |
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Debbi pose la question :
can you please tell me what the exponent 0 is (i.e. 70)
Penny Nom lui répond. |
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0.99999... |
2002-09-26 |
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Erica pose la question :
Yesterday in my 8th grade math class we were being taught how to convert a Repeating Decimal into a fraction. Since I, for some odd reason, seem to understand math better than the rest of my classmates, i began to drown out my teachers explaination for the rule. While she was about half way through with explaining mixed decimals i came up with an unsolvable question. Like I said before, I understand how to turn a repeating decimal into a fraction, but how would I turn a repeating .9 into a fraction? We all know it would equal 9/9, but doesn't 9 over 9 also equal 1? Even though it comes very close to one, it never really equals one. I'm very confused about this and i would love it if you could clear this up for me.
Penny Nom lui répond. |
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The 20 kilometer walk |
2002-08-20 |
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A student pose la question :
THE 1996 OLYMPIC GOLD METAL WINNER FOR THE 20 KILOMETER WALK WAS JEFERSON. HIS TIME WAS 1HOUR, 20 MIN,AND 7SECONDS. HIS TIME WAS NOT GOOD ENOUGH TO BEAT THE WINNER IN 1988 BY JOSEF. HIS TIME WAS 1 HOUR,19 MIN, 57 SECONDS. WHAT WAS THE WALKING RATE OF EACH PERSON?
Penny Nom lui répond. |
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100 from four 9's |
2002-03-27 |
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A student pose la question :
My teacher gave us a math problem to try and figure out and I am stumped. The problem was this.... by only using four nines, how can you get an answer of 100? You can add, subtract, multiply or divide...anything you need to do ,but you can only use four nines.
Leeanne Boehm lui répond. |
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F = -3 + 3 |
2002-03-19 |
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Jessica pose la question :
F= -3 + 3 WHAT IS F?????
Penny Nom lui répond. |
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When will the calendar be the same as 2002? |
2002-02-20 |
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John pose la question :
When will the calendar be the same as 2002? I know the answer is 2013, but I don't know how to answer this mathematically, or if it is possible to do so. This is a ninth grade level algebra question my daughter received from her teacher. Any ideas?
Chris Fisher, Patrick Maidorn and Penny Nom lui répond. |
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What is 20 to the thousandth power? |
2002-02-12 |
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Kristi pose la question :
What is 20 to the thousandth power?
Paul Betts lui répond. |
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50% |
2002-01-15 |
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Lakarrieh pose la question :
4 is 50% of what number?
Penny Nom lui répond. |
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450 students |
2001-12-19 |
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Jessie pose la question :
My teacher told me that the number of ways of lining up the 450 students in our school is larger than the number of atoms in the universe. Is this right? This question came to Good Question, a regular feature on the CBC Morning Edition radio show in Saskatchewan.
Denis Hanson and Harley Weston lui répond. |
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Negative numbers |
2001-11-15 |
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Jewel pose la question :
If zero means nothing or an empty set, then how can a number be less than zero, as in negative number? My understanding of negative numbers is distance from a set point in a given direction. Thus having a negative and positive side of a line is arbritary and is related to displacement rather than value. Am I in error?
Penny Nom lui répond. |
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Column doesn't add up to 100% |
2001-10-17 |
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A student pose la question :
why don't some tables I'm studying in a column add up to 100%? Example: N=338, but responses to questions asked in survey I'm studying equal of 24.3, 9.8, 43.8, DON'T add up to 100%. I'm assuming that some people surveyed out of the 338 didn't bother responding, but is there another problem related to proportion or ratio being used, but improperly labeled on graph?. Note at bottom of table says: "number in parenthesis are numbers of cases" and 338 was in parentheses. I'm lost.
Penny Nom lui répond. |
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60 seconds in a minute |
2001-10-11 |
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Andy pose la question :
I am a fourth grade teacher. Yesterday my students asked "Why are there 60 seconds in a minute?" Which also led to 60 minutes in an hour? I have had trouble determining why the number 60? Any help would be appreciated.
Penny Nom lui répond. |
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Zero as an exponent |
2001-10-04 |
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Wendy pose la question :
How do I explain to kids that i.e. 5 exponent 0 = 1? Does 0 exponent 0 = 1?
Leeanne Boehm and Penny Nom lui répond. |
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The 100 chart |
2001-09-28 |
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Nich pose la question :
Am I suppose to use the 100 chart for these questions. Question One:
I am a 2 digit number my tens digit is 2 more than my one digit my 1 digit is between 4 & 6. What # am I ? Question Two:
I am a 2 digit # I am greater than 40 but less than 60 my tens and ones digits are the same I am a odd number what am I ?
Penny Nom lui répond. |
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0.999999=1? |
2001-09-06 |
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Catherine pose la question :
Hi! My teacher told us that 0.9 repeating equals one. We discussed how this is true. But, I was wondering if there is a proof that this is true. If so what is this called? I was trying to find information, but, it's hard when you don't know the name.
Walter Whiteley lui répond. |
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Repeating decimals |
2001-04-21 |
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Sarah pose la question :
Hi, I'm working on a project for school. The theory I choose was "When turned into a fraction, a repeating decimal has a denometor that is a multiple of three." I have a couple of questions about this topic. My first question is, have you ever heard of this, and what can you tell me about it? My second question is, when I was testing this theory I came across .999... now, when this is a fraction it is 9/9 which is equal to one. The denometor is a multiple of 3, but it's a whole number. I don't understand how a decimal can be equal to a whole number since a decimal is a piece of a whole number. Please don't just show me a math problem, I don't want to see a math problem. I want to see an explanation of this theory and the decimal .999...
Penny Nom lui répond. |
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1 = 0.999... |
2001-04-13 |
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Joan pose la question :
I have a middle grade math question for you. I would like to know why .9999... = 1 ? I can not use algebra to show this or the following: We agree that 2 = 2 and that 2-2 = 0, so
1.00000......
-0.99999.....
----------------
0.000000......
and
0.000... = 0 therefore 0.9 = 1 ----------OR--------------- 1/3 = 0.333333 and 3 X 1/3 = 1, so if 3 X 0.333... = 0.999... then 0.999... = 1 My teacher says that I can not use the above example to show why this is true, and that I must use a couple different examples. He says that there are several other ways. Do you know any? I could really use the help because I can't think of any other ways to show this is true. Thanks for any help you can give.
Penny Nom lui répond. |
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4160 |
2001-03-07 |
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Jessica pose la question :
The product of two consecutive page numbers in this book is 4160. What are the page numbers?
Penny Nom lui répond. |
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Why is 0! = 1? |
2001-01-30 |
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Diane pose la question :
Every math book always claims that 1!=1 and 0!=1 are givens, and that we should just memorize it. i understand the 1! part, but where is the basis for claiming that 0!=1????
Walter Whiteley lui répond. |
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1234567890 |
2000-09-14 |
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Bradley Kloetzly pose la question :
Can you find two whole numbers, with the smallest possible difference between them, which when multipled together equal: 1234567890?
Harley Weston lui répond. |
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10,000! |
2000-07-21 |
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Lauren pose la question :
Hi I was just wondering if you could tell me how many zeros are in 100,000! (factorial.)
Denis Hanson lui répond. |
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A 100-gon |
2000-05-24 |
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Chris Mohr pose la question :
What is a 100-gon called?
Harley Weston lui répond. |
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The side length ratios of some triangles |
2000-04-04 |
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Alexis Lockwood pose la question :
I am doing a project for my Math 30B class regarding the side length ratios of 45-45-90 degree and 30-60-90 degree triangles. I would really appreciate any assistance in answering the following questions, or even direction to an appropriate web site or resource on the matter.
Harley Weston lui répond. |
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1000 percent |
2000-03-17 |
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Matt Stevenson pose la question :
If one invests $4000.00 and makes 1000% on the investment would he/she have $40,000.00?
Could one figure this by: $4000.00 * 10.0 = $40,000.00?
So is 10 times a number the same as 1000%? Would 100 times a number be the same as 10,000%?
Penny Nom lui répond. |
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More on googols |
2000-02-23 |
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Kevin Brennan pose la question :
Could you please give me a couple of examples of when you MATH guys would use a google. Do youu measure, like, galaxies with it ? Or was it created to keep track of Mr Gate's bank account.
Penny Nom lui répond. |
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.400 in Baseball |
1999-12-15 |
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Nieve Nielson pose la question :
I have several questions to ask about the probability of getting a .400 in baseball: - What is the probability of a baseball player hitting a .400 in one game, considering that the hitter is up to bat four times?
- What is the probability of a baseball player hitting a .400 in a season, considering that there are 100 games in a season? With the first two questions in mind:
- Considering that baseball has been around for about 100 years, about how many people should hit .400 inthat time?
Chris Fisher lui répond. |
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Bases other than 10 |
1999-12-06 |
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Garret Magin pose la question :
We are doing a lesson on numbers of other bases than 10. We are working with binary, octal, and Hexadecimal. I was wondering what is used to represent number of different bases other then 16? Does it just continue on with the alphabet and if so what happens when you get to Z. It would be a help if you could answer this because it is really bugging me. And none of the math teachers at my school could let me know.
Claude Tardif and Patrick Maidorn lui répond. |
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Powers of zero |
1999-10-31 |
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Salina Young pose la question :
Hello! I have two questions to ask about the power of "0". First, what is the value of "0' to the power of "0"? And why? Second, what is the value of "0" to the power of "2" or '3" etc? And why? Thank you for your help.
Walter Whiteley and Harley Weston lui répond. |
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A googol |
1999-10-06 |
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Kevin Brennan pose la question :
describe to me a guegoll is that how u spell it? it sounds like that
Penny Nom lui répond. |
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Y2K? |
1999-09-03 |
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Mike Putzakulish pose la question :
In Y2K, the "K" stands for thousand, but where did the "K" come from? I know it's not a Roman Numeral, but what is it??
Chris Fisher and Harley Weston lui répond. |
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Division by zero |
1999-09-02 |
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Joshua B. Mariano pose la question :
Why can't I divide a number by zero. When I put in my calculater 0 divided by 7 it equals 0. But when I put 7 divided by zero my calculater say's error. Why can't this be solved? What is the answer? Is there a paper on it? Help?
Walter Whiteley lui répond. |
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Repeating decimals |
1999-05-21 |
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Stan pose la question :
Hi, I am in Honors Math, and have confronted everyone, including teachers, about repeating decimals. What interests me is the number 0.9... and 1. Everyone says that since there is no number between 0.9...(repeating) and 1, that 0.9... = 1. However, isn't a repeating number a representation of a number, and not a real number? Let's look at it this way. 0.9 is close to 1. 0.99 is closer. 0.99999999999999 is even closer. so, 0.9... is a representation of it's closeness to 1. it's an active number... I don't understand how 0.9... is equal to 1. Please help me prove that 0.9... does NOT = 1.
Penny Nom lui répond. |
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Base 2 to Base 10, conversion, convert |
1999-05-08 |
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Larry Bader pose la question :
101000112 is the same as what number in Base ten? a. 83
b. 128
c. 93
d. 326
e. 163
Penny Nom lui répond. |
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Large Numbers |
1999-04-05 |
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CK pose la question :
Hello. I need a lesson plan for grades 4 to 7 dealing with the concept of large numbers. Specifically, how to teach scientific notation. The lesson plan has to deal with the following: the size of the universe is so huge that is is almost beyond the ability of the mind to comprehend. One way is to measure...
Chris Fisher lui répond. |
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Finding Excluded Values |
1999-04-01 |
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Lorraine Le Cam pose la question :
The question asks me to find the value of the variable that must be excluded in each rational expressionion. The operation is: a
______
a - 2 How do I work this out?
Harley Weston lui répond. |
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Place Value |
1999-01-05 |
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Reg pose la question :
I work in a Section 27 classroom with various grades. I am looking for assistance on how to deliver a lesson on place value:decimal numbers keeping in mind that they need to see it (visual) to comprehend. I am looking for grade 4-6 level.
Jack LeSage lui répond. |
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Indeterminate forms |
1998-12-11 |
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R. Dixon pose la question :
What is the correct evaluation of infinity/0 ? I've checked three different math sites. One says definitively, that infinity/0 is "not" possible. Another states that infinity/0 is one of the indeterminate forms having a large range of different values. The last reasons that infinity/0 "is" equal to infinity.
Walter Whiteley and Harley Weston lui répond. |
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The sum of the angles of a triangle is 180 degrees |
1998-02-19 |
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Quin Liu pose la question :
How do you prove that the sum of the angles of a triangle is 180 degrees? Is there a proof? what is it?
Chris Fisher lui répond. |
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0! |
1997-03-02 |
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Donna D. Hall pose la question :
I am looking for a quick and easy explanation as to why 0! is 1.
Walter Whiteley and Denis Hanson lui répond. |
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Why is a circle divided into 360 degrees? |
1996-09-30 |
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Kurtis Kredo pose la question :
I was recently wondering why a circle has been divided in to 360 degrees. When I asked my physics teacher he could not think of an answer. His guess is that it probably has to do with people long ago using the base 6 number system. I have a small inkling that it has to do with easy conversion or usage with radians or grads.
Chris Fisher lui répond. |
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a to the power zero |
1996-06-03 |
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Beti pose la question :
Why is a number to the power 0 equal to 1?
Harley Weston lui répond. |
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