17 articles trouvés pour ce sujet.
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Seven tangent circles |
2018-04-23 |
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Domenick pose la question :
How to calculate the circumscribed and inscribed circles formed by seven .019685 diameter circles arranged in a circle with all seven circles tangent to each other?
Penny Nom lui répond. |
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Seven switches with 3 stages each |
2015-09-15 |
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jeff pose la question :
We are trying to solve a combination problem. If I have 7 things that can be in 3 states (say on/partially on/off), and all 7 have to a state. How many different combinations can there be? It doesn't seem like we should treat it as 21 independent things, but not sure how to break the problem apart.
Penny Nom lui répond. |
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Counting by sevens |
2010-04-13 |
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Larry pose la question :
Lee counted by 7's beginning with one of the whole numbers from 1 through 7, until Lee passed 1000. If Lee counted
three of the following numbers, which number did Lee NOT count?
a. 107
b. 184
c. 534
d. 641
Robert Dawson and Penny Nom lui répond. |
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Holiday for 7 golfers |
2010-01-05 |
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Andy pose la question :
I am having difficulty scheduling pairings for a forthcoming Golf holiday. There are 7 players and we will be playing 7 rounds - each round will be a 3 ball and a 4 ball. I am trying to work out a schedule that means everyone plays with each other roughly the same number of times (with a minimum of, say, 3 times if possible). Also, we are looking to ensure everyone plays in roughly the same number of 3 and 4 balls. Any suggestions would be much appreciated (we leave in 10 days time). Thank you.
Victoria West lui répond. |
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Seven circles |
2009-09-20 |
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Bobbi pose la question :
try to put number 1 to 7 in seven circles (one in the middle, 3 on top, 3 below) so the numbers in each row of three circles--vertical, horizontal, and diagonal -- add up to 12. Each number can be used only once.
Stephen La Rocque lui répond. |
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Ambitious 7th Grader |
2009-01-28 |
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John pose la question :
I have been asked to tutor a 7th grader who is very good in math. He is taking the most advanced course that his school offers to 7th graders. This course will cover Algebra 1 over a period of two years, using McDougal Littell's Algebra, Structure and Method, Book 1, a book I like a lot.
I have been hired not to help him with his schoolwork, which is too easy for him, but to guide him through something in math beyond his schoolwork. This was his idea, an idea which surprised his parents, but one which they support.
Do you have a suggestion for me? If so, I would be very grateful to hear from you. I think this could be a lot of fun for me and my new student, if I pick the right path.
Thanks and best regards,
John
John
Robert Dawson, Victoria West and Walter Whiteley lui répond. |
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A seven card poker hand |
2009-01-12 |
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Sean pose la question :
from a standard card deck, seven cards are chosen at random.
find the probability that the set chosen contains exactly three of each
of two different face values.
the second part of the problem asks the probability that the card hand contains
exactly three 2's and exactly three 5's.
Robert Dawson lui répond. |
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A 7-digit odd number |
2008-06-26 |
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Godryk pose la question :
I am the smallest 7-digit odd number. my ones digit is the sum of my thousands, and ten thousands digits. What number am I?
Penny Nom lui répond. |
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Base seven |
2007-05-19 |
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Dan pose la question :
A number X is converted to base 7 and becomes a four digit number. Its leftmost digit is removed and written again as the rightmost digit. The number thus obtained is twice X. Find the decimal representations of all such numbers X.
Penny Nom lui répond. |
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Seven digit account numbers |
2007-03-09 |
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Miranda pose la question :
Account numbers for the Central Oil Company consist of seven digits. If the first digit cannot be 0, how many account numbers are possible? Thank you so much!!!
Penny Nom lui répond. |
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37 with four 4'2 |
2004-01-03 |
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Myra pose la question :
Using four fours and only four fours to get an answer of 37.
Claude Tardif lui répond. |
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Divisibility by 7 |
2003-11-14 |
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A student pose la question :
how do you test a number to see if it is divisible by 7 or not?
Penny Nom lui répond. |
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Making 7 |
2002-11-26 |
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Bill pose la question :
At one time I had the answer to this math equation but I have lost it and can't seem to regain it. I may be going at it wrong but as I recall there were the numbers 1 through 4, and the std operators, +, -, /, *, and parentheses. The object was to make the four numbers with the operators equal to 7. Each number and operator may be used only once. My 9 year old loves these quizzes but I can't give it to her if I can't provide the correct answer.
Claude Tardif lui répond. |
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Rolling 5 sevens before rolling a six or an eight |
2002-01-20 |
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Tony pose la question :
When rolling 2 dice, what is the probability of rolling 5 sevens before rolling a six or an eight?
Andrei Volodin and Penny Nom lui répond. |
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The best of 7 |
2001-09-08 |
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Michelle pose la question :
Professional basketball, hockey, and baseball championships are decided on the best 4 out of 7 games. The first team to win four games wins the championship. In how many possible ways could the team win the championship series after winning the first game?
Example:
Game 1 2 3 4 5 6 7
Result W L L W W W
Leeanne Boehm lui répond. |
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Generating uniquie 2 digit numbers |
2001-07-16 |
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Anthony pose la question :
What methodology can I use to generate uniquie 2 digit numbers from unique 7 digit numbers. Of'course the total number of 7-digit numbers is not greater than 99.
Penny Nom lui répond. |
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Rule of 78 |
2000-03-22 |
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Dan Baumgarten pose la question :
Can you explain the rule of 78 and the reverse rule of 78? Thanks.
Claude Tardif lui répond. |
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