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Zero 2001-03-15
Alexandre pose la question :
j'aimerais beaucoup savoir si le chiffre zéro est considéré comme étant soit:
  1. pair
  2. impair
  3. pair et impair à la fois
  4. ni pair ni impair.

Claude Tardif lui répond.
Is -1 an odd integer? 2020-09-27
Nicole pose la question :
is -1 an odd integer?
Penny Nom lui répond.
Three consecutive odd integers 2020-04-10
Roxie pose la question :
What is three consecutive odd integers?
Penny Nom lui répond.
Odds 2019-12-16
Craig pose la question :
I’d like to know what are the odds of a lotto machine giving out a specific 4 digit number as a quick pick?
I know there are 10,000 possible 4 digit combinations. So let’s say the number is 3587 what are the odds the lotto machine spits it out EXACTLY that way on a quick pick?

Penny Nom lui répond.
Four odd factors 2018-07-04
Manchali pose la question :
Find a number that has 4 factors and all of them are odd numbers.
Penny Nom lui répond.
Two odd integers 2018-06-04
Pleroma pose la question :
The product of two alternate odd integers exceeds three times the smaller number by 12. What is the larger number?
Penny Nom lui répond.
Three consecutive odd integers 2017-10-10
Johanna pose la question :
Three consecutive odd integers are such that the sum of the first and second is 31 less than 3 times the third
Penny Nom lui répond.
Two consecutive odd integers 2017-07-14
Adeeb pose la question :
Find two consecutive odd positive integers, sum of whose square is 290.
Penny Nom lui répond.
Divisibility of 3n^5+7n 2016-12-14
Parag pose la question :

Question from Parag, a student:

if n is a natural number,then 3n^5+7n is divisible by
a)2
b)3
c)5
d)7

i got the answer but still i need a valid alternate approach.


Penny Nom lui répond.
The sum of three integers is 30 2016-12-06
Vaishnavi pose la question :
_+_+_:30. Blanks are to be filled by(1,3,5,7,9,11,13,15) and numbers can be repeated.
Penny Nom lui répond.
20 mangoes 2016-04-01
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.
A 13 game bet 2016-02-28
farah pose la question :
I'm trying to calculate the odds of a 13 game bet. Each game has 2 teams with 3 possible outcomes (win,draw,lose).

What are the odds.

Penny Nom lui répond.
Two consecutive odd integers 2015-03-09
gowtham pose la question :
The sum of two consecutive odd integers is 20.find the integers
Penny Nom lui répond.
Even and odd 2014-11-28
Subrahmanya pose la question :
n1, n2, n3....................,n1997 are integers not necessarily distinct. (actually in n1, n2,.............., n1997 the numbers 1,2,.................,1997 are subscripts of 'n')

X= (-1)^n1+(-1)^n2+............+(-1)^n998

Y=(-1)^n999+(-1)^n1000+............+(-1)^n1997

Then

which of the following options is true

A) (-1)^X = 1, (-1)^Y = 1 B) (-1)^X = 1, (-1)^Y = -1
C) (-1)^X = -1, (-1)^Y = 1 D) (-1)^X = -1, (-1)^Y = -1
E) none of these

Penny Nom lui répond.
Three consecutive odd integers 2014-10-17
Maddy pose la question :
3 times the largest of three consecutive odd integers is 13 more than the sum of the other two. What are the integers?
Penny Nom lui répond.
The largest odd number using the digits 08672 2014-06-24
audrey pose la question :
what is a 5 digit greatest odd number out of this given digits? 08672
Robert Dawson lui répond.
Consecutive Numbers Question 2013-08-11
Lucy pose la question :
Hello,
I have a question about consecutive numbers. So lets say a question tells you to find what three consecutive numbers are that add up to a certain number. To calculate this, would you use 2x+1, 2x+3, 2x+5 or just x, x+2, x+4.
Also, the same question for even numbers. Would you use:
2x, 2x+2, 2x+4 or just x, x+2, x+4.
My math book is confusing because it uses the first strategy(the 2x+…) in some situations and the second strategy(x+…) in other situations. Thus, can you provide me an explanation of why you would use the strategy that is correct?
Specifically, my book answered this question: If “n” is the first of five consecutive odd numbers, what is their average, using n,n+2….=5n+20 and average is n+4(this is the answer),.
For the question: the sum of 4 consecutive odd integers must be:
Divisible by 8 but not necessarily 16(this is the answer), it used the strategy 2k+1, 2k+3…=8k+16.

Thank you so much for taking the time to answer my question.

Harley Weston lui répond.
Three consecutive odd integers 2013-07-08
sparsh pose la question :
Three times the first of three consecutive odd integers is 3 more than twice the third. The third integer is:
Robert Dawson lui répond.
If n is odd, then n^2 - 3 is even 2012-12-11
Tracy pose la question :
Prove the statement:

For all integers n, if n is odd, then n2 - 3 is even.

Penny Nom lui répond.
The square of any odd number, decreased by 1, is divisible by 8 2012-11-16
bailey pose la question :
Prove that the square of any odd number, decreased by 1, is divisible by 8
Penny Nom lui répond.
4 digit combinations 2012-10-17
Scott pose la question :
How many different 4- number combinations from 0-1-2-3-4-5-6-7-8-9 with 2 out of the 4 odd and 2 out of the 4 even, with no numbers repeating. Thanks
p lui répond.
15 pigs and 6 pens 2011-11-16
Mike pose la question :
I have 15 pigs and 6 pens, I have to put them in odd numbers, how do I do it.
Chris Fisher lui répond.
Twice an even number 2011-10-10
Ron pose la question :
The number of dollars that Tracy has in her pocket is an odd number. Hal gave Tracy $2 more than she already had in her pocket. The number of dollars Tracy now has cannot be _________.
a) $60 b) $62 c) $64 d) 68

Penny Nom lui répond.
Three consecutive odd integers 2011-10-07
Muneera pose la question :
Find 3 consecutive odd integers so that 3 times their sum is 5 more than 8 times the middle one?
Penny Nom lui répond.
A four digit number 2011-09-16
gina pose la question :
i am having a hard time figuring this out.. i believe the answer is 3105 but the 0 is throwing me off... i am a 4 digit number between 3100 and 3200, none of my digits are even, the sum of my digits is 9, the largest digit is in the ones place, what number am i ??
Penny Nom lui répond.
Three consecutive odd numbers 2011-03-11
George pose la question :
Write an equation three consecutive odd numbers whose sum is 75
Penny Nom lui répond.
Three consecutive odd integers 2010-11-07
karen pose la question :
find three consecutive odd integers such that twice the sum of the second and the third is 43 more that three times the first
Penny Nom lui répond.
Can a fraction be an even or odd number? 2010-08-25
Kenneth pose la question :
Can a fraction be an even or odd number? If not , why?
Stephen La Rocque and Harley Weston lui répond.
A collection of baseball cards 2010-07-01
Martha pose la question :
Cody has a collection of baseball cards. Is it possible for him to place the cards into 5 boxes so that exactly 3 of the boxes contain an odd number of cards and the total number of cards in two of the boxes is the same as the total number in the other 3 boxes? Explain.
Robert Dawson, Penny Nom and Claude Tardif lui répond.
Odd integers 2010-05-28
jack pose la question :
If x is an odd integer, which of the following must also be an odd integers a) x+1; b) 2x; c) x+4; d) x-1; e) x/2? Please help me to solve this problem. Thank you.
Penny Nom lui répond.
Odd numbers with no repeated digits 2010-05-01
jameka pose la question :
How many odd numbers can be written from the set {2,3,4,5,6} if no digits may be used more than once?
Penny Nom lui répond.
7 odd numbers 2010-02-19
mike pose la question :
Hello there, Problem: find 7 odd numbers who sum is equal to 30. Hint*My professor said it's possible to add 7 odd numbers and get 30 for an answer! and he said we can use Negative and rational numbers but no decimal or fractions. So is there anyway of solving this? Please get back to ASAP! thanks.
Harley Weston and Tyler Wood lui répond.
Three digit odd numbers 2010-02-04
Rebecca pose la question :
Question from rebecca, a student:

how many three digit odd numbers can be formed using the digits 1,2,3,4,5,6 without using any digit more than once?

Tyler Wood lui répond.
Odds and evens in an n by n+1 table 2010-01-21
Shankar pose la question :
The boxes of an n * (n+1) table ( n rows and n+1 columns) are filled with integers. Prove that one can cross out several columns ( not all of them !) so that after this operation all the sums of the numbers in each row will be even.
Robert Dawson lui répond.
Consecutive odd intergers 2010-01-06
keyanna pose la question :
list five consecutive odd integers, starting with -3
Robert Dawson lui répond.
Consecutive odd integers 2009-11-09
Erin pose la question :
I'm having trouble with consecutive integers. i know it goes n + n + 1 + n + 2 and so on, but if its odd then do the numbers change to odd ones? i don't know the question is: the sum of four consecutive odd integers is -72. write an equation to model this situation and find the values of the four integers
Robert Dawson and Penny Nom lui répond.
Four consecutive odd integers 2009-10-24
Tonya pose la question :
the sum of four consecutive odd intergers 2008 what are the intergers
Penny Nom lui répond.
Rolling a six on the sixth roll 2009-05-04
Scott pose la question :
What are the odds of rolling a die 6 times in a row and rolling a 6 only on the 6th try, but not any other time? And how is this calculated?
Harley Weston lui répond.
15 pigs in 4 pens 2009-04-22
Melissa pose la question :
A farmer has 15 pigs. He wants to put them all into 4 pens, have an odd number of pigs in each pen, and have no pigs left over. Also, he isn't thinking about having any for dinner, as they are his pets.
How does he do it?

Robert Dawson lui répond.
Three consecutive odd integers 2009-04-02
Brian pose la question :
Find the greatest of three consecutive odd integers if the product of the second and third is 8 more than 13 times the first.
Robert Dawson lui répond.
The odds against drawing a red queen 2009-03-15
tabyia pose la question :
7. The common deck of 52 cards has 26 black cards (13 spades and 13 clubs) and 26 red cards (13 hearts and 13 diamonds). Each suit consists of ace, king, queen, jack, ten, nine, eight, seven, six, five, four, three and deuce. 13in all.

A single card is chosen at random. Find the odds against its being a red queen?

How many cards will I have to draw to be absolutely certain that I have drawn three black cards

Harley Weston lui répond.
Three consecutive odd integers 2009-03-11
Susan pose la question :
Find three consecutive odd integers such that the sum of the first, twice the second, and three times the third is 70
Penny Nom lui répond.
Dividing the digits 1 - 9 into two groups 2009-02-09
donna pose la question :
using the numbers 1 to 9 can you arrange these into 2 groups, both of which have the same total, and no you cant turn the 6 upside down
Penny Nom lui répond.
Three consecutive odd integers 2008-11-03
kim pose la question :
Determine three consecutive odd integers such that twice the sum of the second and third is 29 less than 5 times the first.
Penny Nom lui répond.
Is it possible to a function to be both even and odd ? 2008-09-28
Mohammed pose la question :
Is it possible to a function to be both ( Even and Odd )
Harley Weston lui répond.
Is zero an even number, an odd number, or neither? 2008-08-04
Donna pose la question :
Is zero an even number, an odd number, or neither? Why?
Victoria West lui répond.
A quadratic equation with odd coefficients 2008-04-15
Manashi pose la question :
If p,q,r be any odd integers, then prove that the roots of the quadratic equation px^2+qx+r=0 can't be rational .
Stephen La Rocque lui répond.
Two consecutive odd numbers 2008-04-01
prinsilla pose la question :
of all pairs of consecutive odd integers whose sum is greater than 75. find the pair whose sum is least?
Stephen La Rocque lui répond.
Two consecutive odd integers 2008-03-24
Jarrod pose la question :
the sum of two consecutive odd integers is 24. Find the two integers
Stephen La Rocque lui répond.
Two consecutive odd positive integers 2008-03-12
Sarah pose la question :
The sum of the squares of two consecutive odd positive integers is 74. What are th integers?
Penny Nom lui répond.
Some three-digit numbers 2008-03-05
Toni pose la question :
The following is a word pattern problem listed on my son's homework: write a set of three-digit numbers that contain one odd number and three even numbers. This confused the both of us because that would make his number a four digit number, right? please respond. Thanks.
Penny Nom lui répond.
3 consecutive odd integers 2008-02-28
Pat pose la question :
For 3 consecutive odd integers, twice the first integer, plus 5 more than the second integer, plus three less than four times the third integer equals -85. Find the 3 consecutive odd integers.
Penny Nom lui répond.
Three consecutive odd integers 2008-01-24
daniel pose la question :
find three consecutive odd integers such that three times the second minus the third is 11 more than the first. help! i have x+1, x+3, x+5 as my 3 odd integers is this correct its been a while.
Penny Nom lui répond.
Why does an odd + odd = an even? 2007-09-06
austin pose la question :
why does an odd + odd = an even?
Penny Nom lui répond.
Combining probabilities 2007-08-20
Arul pose la question :
Xavier, Yvonne, and Zelda each try independently to solve a problem. If their individual probabilities for success are 1/4, 1/2 , and 5/8 , respectively, what is the probability that Xavier and Yvonne, but not Zelda, will solve the problem ?
Stephen La Rocque lui répond.
The odds of winning a contest 2007-07-29
Kevin pose la question :
I have been asked by a customer in Missisauga to track down some odds of winning a contest. In this contest, the last 4 digits of the winner's driver's license number have to match the last 4 digits of a Harley VIN number. There are 200 people maximum allowed into the drawing, 10,000 total possible VIN combos. Would the odds be 1:50 or something other than that?
Harley Weston lui répond.
What are the odds that the selections were random? 2007-05-26
alan pose la question :
An employer must select three people for layoff from three groups. Group 1 has 4 members and the oldest member is selected. Group 2 has 7 members and the oldest member is selected. Group 3 has 2 members and the younger is selected. Assuming equal qualifications, what are the odds that the selections were random vs. biased as to age? What is the formula to determine this?
Penny Nom lui répond.
Two consecutive odd numbers 2007-03-19
Alicia pose la question :
The sum of two consecutive odd numbers is divisible by 4.

Can you make similar statements about the sum of three consecutive odd numbers and of four consecutive odd numbers? Generalize your findings.

I tried :
n= smallest odd number therefore the next = n, n+2 and the second =n+4 and the third = n+6 Now n+ n+2+n+4+n+6/4
Please help I am not sure of this I am just trying

Penny Nom lui répond.
The square of an odd number 2007-03-16
Samantha pose la question :
Is the square of an odd number always odd?
Stephen La Rocque and Penny Nom lui répond.
An odd function 2007-03-06
Dana pose la question :
If g(x) has a domain of all real numbers, name one point on a graph and explain why it must be there. g(x) is an odd function.
Penny Nom lui répond.
21 pigs and only 4 pig pens 2007-01-11
Emma pose la question :
i was given this pig pen problem. if there are 21 pigs and only 4 pig pens how can you distribute the pigs into the pens and have an odd number of pigs in each pen. it doesn't seem possible to me. i need help!
Haley Ess lui répond.
Three consecutive odd integers 2007-01-08
Emma pose la question :
Find three consecutive odd integers such that the sum of the first and second is 27 less than 3 times the third.
Stephen La Rocque lui répond.
The Pythagorean theorem 2006-12-12
Beth pose la question :
In a pythagorean theorem can the sides of a right triangle be three consecutive odd integers
Stephen La Rocque lui répond.
Factors 2006-11-22
Jacqueline pose la question :
Why do the numbers 16,36,48,60,64,90 and 100 have an odd number of factors?
Stephen La Rocque and Penny Nom lui répond.
What is the probability that the sum of the two numbers is even? 2006-11-01
Ryan pose la question :
10 balls numbered 1-10 are in a jar. George reaches into the jar and pulls out a ball. Then Wally pulls out another ball. What is the probability that the sum of the two numbers is even?
Haley Ess lui répond.
An odd number of factors 2006-10-28
Anthony pose la question :
What is the common name used for numbers that have an odd number of factors? This answer should be a two word answer only.
Stephen La Rocque lui répond.
Three consecutive odd numbers 2006-10-21
Pige pose la question :
The sum of three consecutive odd numbers is 387. Find the numbers.
Penny Nom lui répond.
How many students are in the class? 2006-10-12
Lillian pose la question :
There is one more boy than girls in the class, how many students in all?
Stephen La Rocque lui répond.
The odd numbers from 30 to 80 2006-09-21
Kieran pose la question :
If you added all the odd numbers from 30 to 80, would the answer be even or odd? Explain.

I think it would be odd because I used this equation:
(30 x 5)+(40 x 5)+(50 x 5)+(60 x 5)+(70 x 5)+(25 x 5)=1325
I used the numbers for each set of ten -30 to 80 times 5 and the amount of the endings-1,3,5,7,9- added, times 5. Is that right?

Penny Nom lui répond.
2-row arrays 2006-09-06
Liz & Samantha pose la question :
What do you call the numbers that cannot be arranged into 2-row arrays?
Penny Nom lui répond.
Odd-man out coin tossing and probabilities 2006-04-27
Kalyan pose la question :
When four people toss fair coins, what is the probability that in a given toss there will be one "odd man". That is one person whose coin does not have the same out comes as that of any other members?
Stephen La Rocque lui répond.
How to find the odds for a lottery jackpot 2006-04-12
Harvey pose la question :
Is it best to use factorials to calculate the odds of winning a lottery, such as the MegaMillions that is popular in the US, or is there a better way?
Stephen La Rocque lui répond.
Probability of getting their stories straight 2006-04-05
Amy pose la question :
Four students drive to school in the same car. They claim they were late because they had a flat tire. Assuming they did not have a flat tire what is the probability that they all would choose the same tire if asked which one was flat.
Stephen La Rocque lui répond.
Is zero even or odd? 2006-04-04
Aliya pose la question :
I would like to know if zero is an odd number or even number. I remembered my kindergarten teacher saying it is an odd number. My mom and sister says it is even number.
Penny Nom lui répond.
Is a zero considered an even or odd number? 2005-12-13
Sylvia pose la question :
Is a zero considered an even or odd number?
Penny Nom lui répond.
The sum of n consecutive integers 2005-11-27
Craig pose la question :

If 875 is expressed as the sum of n consecutive integers (n > 1), then the number
of possible values of n is?

Possible Answers:
A) 15
B) 8
C) 7
D) 16
E) 4


Penny Nom lui répond.
Numbers with exactly 5 divisors 2005-11-23
Mary Lou pose la question :
Show the 10 numbers with exactly 5 divisors.
Penny Nom lui répond.
When will x^2+xy+(y-x) be even? 2005-11-08
Lana pose la question :
If x and y are integers, when will x squared+xy+(y-x) be even?
Penny Nom lui répond.
Why is zero even? 2005-11-08
Lauren pose la question :
A child in my class if having trouble with the concept of zero being an even number, I have talked with her about its zero because it is a multiple of 2, any other suggestions?
Paul Betts lui répond.
Seven consecutive reds in roulette 2005-09-04
Joe pose la question :
I know that the odds are a little less than 50% for either black or red comming up on a spin of the roullette wheel. My question is what are the odds of red or black comming up 7 times in a row?
Penny Nom lui répond.
Can one place 15 integers around a circle... 2005-08-20
Hernan pose la question :
Can one place 15 integers around a circle so that the sum of every 4 consecutive numbers is equal either to 1 or 3?
Claude Tardif lui répond.
Probabilities in poker 2004-11-04
Ben pose la question :
Please can someone tell me the odds of getting a royal flush while playing texas hold em.
Please can you also let us know the odds of a royal flush while playing texas hold em if you must be dealt two of the needed cards.

Chris Fisher lui répond.
Sums and differences 2004-02-10
David pose la question :
The sum of two whole numbers is 63. The difference between the numbers is 10. Find all the possible pairs.
Claude Tardif and Penny Nom lui répond.
Is zero even? 2004-01-07
A secretary at an elementary school pose la question :
Is zero an even number?
Penny Nom lui répond.
Two row arrays 2003-09-03
Madalyn pose la question :
My question is, what are #'s that can not be arranged in two row arrays called?
Penny Nom lui répond.
Two precalculus problems 2003-08-04
Kate pose la question :

Please help me verify the identity:
cos2x(sec2x-1)=sin2x

Also I am having trouble withdetermining whether f(x) is odd, even, or neither
f(x)=x3-x


Penny Nom lui répond.
The area of an odd shaped piece of property 2003-07-24
Barry pose la question :
What is the formula for figuring the square footage of an odd shaped piece of property?
Penny Nom lui répond.
Would it be worth paying $20K for 4 chances... 2003-01-13
Steve pose la question :

If I've got 4 chances to to achieve X goal, and in each chance that I have I've got a 65% chance of achieving this goal, what is my overall probablity of achieving this goal? Also, what would it be after each of my 4 chances (i.e., for my 2nd chance, would it be (.65 * (.65*.65)? I've forgotten some basic probablity theories, and would appreciate any help on this.

With the probablities above, would it be worth paying $20K for 4 chances to achieve the goal or $8.5K for only 1 chance to acheive the goal? (at 65% probability)


Andrei Volodin lui répond.
Odd and even 2002-12-17
Martin pose la question :
I am a graduate engineer trying to teach single digit addition to my 8 year old grand-daughter. My questions follow.

Assume a child does not know what multiplication and division are.

Assume the child knows how to count from 0 to 10

How do you explain that 2, 4, 6, 8 and 10 are even numbers

And 1, 3, 5, 7 and 9 are odd numbers

And these three facts?

  1. when you add two even numbers, the answer is even
  2. when you add two odd numbers, the answer is even
  3. when you add an even number and an odd number, the answer is odd?

Can all of these be reasoned out, without using the concepts of multiplication or division?


Diane Hanson lui répond.
Place six numbers around a triangle 2002-07-19
Monika pose la question :
I need to place six numbers around a triangle, as such that one number is on each corner, and one number on each side making three numbers in one line, adding up to two hundred exactly. The number I have to use are, 40, 50, 60, 70, 80, 90. I have to use each one once, there for, each number cannot be repeated.
Claude Tardif and Chris Fisher lui répond.
Pigs in pens 2002-07-10
Shannon pose la question :
A farmer has 21 pigs and 4 pens, he must put an odd number of pigs in each pen, how does he do it?
Penny Nom and Chris Fisher lui répond.
Odd plus even is odd 2001-10-14
James pose la question :
Why is the sum of an odd number and an even number always odd?
Peny Nom lui répond.
15 mice in 4 cages 2001-10-08
Chelsea pose la question :
How can you fit 15 mice into 4 cages with an odd number of mice in each cage?
Claude Tardif and Harley Weston lui répond.
Probabilities and dice. 2001-05-04
Carmen pose la question :
Hi! My name is Carmen! I am a member of a grade 5 class in Edmonton, AB. We were talking about probability in math, and I was wanted to know what the probability (odds) of rolling two sixes would be rolling two dice? If it is not to diffucult could you tell me what the probability (odds) of rolling any number with two dice were?
Andrei Volodin and Penny Nom lui répond.
Is there an odd and even function? 2001-03-02
Saima pose la question :
Is there a function that is both even and odd at the same time? In other words, is there a function that can pass the y-axis, x-axis, and origin symmetry test?
Claude Tardif and Penny Nom lui répond.
The odds of winning 2001-02-09
Anna pose la question :
The odds of winning in a game are 3 out of 10. How many times would one have to play the game in order to be sure they would win?
Leeanne Boehm lui répond.
14, with 5 ODD numbers 2001-01-23
Robyn Ernst pose la question :
How can you get 14, with 5 ODD numbers?
Claude Tardif lui répond.
Three consecutive odd integers 2000-08-18
Wallace pose la question :
A six-digit integer XYXYXY, where X and Y are digits is equal to five times the product of three consecutive odd integers. Determine these three odd integers.
Paul Betts lui répond.
Odds and combinations 2000-05-10
Lucy pose la question :
If the odds are 1/15 of winning, what is the probability?

if c 5! 3! How does it equal 10?


Harley Weston lui répond.
Probability and odds 2000-05-05
Leah pose la question :
The chances of rain on friday, saturday, and sunday are 20%, 30%, and 50% respectively. what are the odds it will rain all three days?
Harley Weston lui répond.
Is zero an even or odd number? 2000-02-06
Christian Hansen pose la question :
On a list I run, someone posted that 02-02-2000 was the first date since 28-08-888 where all the digits were even. Of course, this provoked a discussion of whether zero was odd, or even, or neither. I remember reading that, for symmetry's sake, it is considered by mathematicians to be even. Any thoughts?
Patrick Maidorn lui répond.
Two algebra problems 1999-12-17
Michael Standfest pose la question :
If x+4 is a factor of 2x4+kx3-3kx2+6x-40, find k

and

Prove that n2-n is even for all n, using the proof of contradiction
Penny Nom lui répond.

An odd number of factors 1999-10-22
Melissa pose la question :
What is the common name used for numbers that have an odd number of factors? What is the least positive integer that has exactly 13 factors?
Penny Nom lui répond.
A Multiple Choice Test 1999-08-31
Cintra Ramnarine pose la question :
I have ten questions. There are two multiple choice answers to each question. What are the chances of answering all questions correctly.
Harley Weston lui répond.
Even and Odd Function 1999-06-17
Kent pose la question :
There is one function with the domain of all real numbers that is both even and odd. Please give me the answer to this question before I go insane.
Penny Nom lui répond.
Evens and odds 1999-05-04
Emily Hays pose la question :
My name is Emily Hays, I am in the 6th grade and my teacher gave me some extra probelms to see if I could solve them. She can't find the KEY and I can't figure out the probelm so she suggested I e-mail you guys to see if you could help us. Here's the Problem:

The numbers 1,2,3...,1999 are written on the blackboard in the classroom. Evertime the teacher enters the room he chooses two numbers on the blackboard, say a & b, with a> or equal to b, then he erases them and writes the difference a-b somewhere on the blackboard. After this procedure is carried on 1998 times, there will be only one number left on the blackboard. Prove the last remaining number must be even.

I hope you can help us!
Chris Fisher and Harley Weston lui répond.

 
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