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Order of operations |
2003-02-16 |
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A student pose la question : How is the order of operation used in everyday life other than in a math class or at school? Also .... Can you give me a list of all the mathematician that are still living that uses the order of operation? Claude Tardif lui répond. |
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Numbers in base 5 |
2003-02-16 |
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Lori pose la question : I'm trying to help my 6th grader with converting numbers like 82 to base 5 and 182 to base 12. We saw your examples on 613, but still are confused. Penny Nom lui répond. |
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Order of operations |
2003-02-15 |
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Debbie pose la question : Question: 20-(9+4)x7=? Possible answer -71 or 49? Penny Nom lui répond. |
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A determinant |
2003-02-13 |
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A student pose la question :
I have to find the determinant of the following matrix -2 | 3 | 1 | 2 | 4 | -3 | 0 | -2 | 5 | 1 | 4 | 2 | 1 | -3 | 5 | 2 | 3 | 4 | -1 | 2 | 6 | 0 | 3 | 2 | -4 | Penny Nom lui répond. |
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Wrap a rope around the equator |
2003-02-12 |
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Ali pose la question : If you take a rope and wrap it around the equator and then overlap it 6ft. and cut off the extra then you loosen it up so the ends meet how far would it stand off the ground? Penny Nom lui répond. |
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Multiples of all four of the numbers 2, 3, 4, and 5 |
2003-02-11 |
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Stephanie pose la question : How many of the first 1000 positive integers are multiples of all four of the numbers 2, 3, 4, and 5? Penny Nom lui répond. |
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Storyteller figurines |
2003-02-10 |
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A student pose la question : It takes 3/4 of an hour to bake a storyteller figurine. If only one figurine can be baked at a time, how many can be baked in 6 hours? Penny Nom lui répond. |
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Splitting weight |
2003-02-10 |
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Jin Ho pose la question : A balance scale has only two weights, 1 ounce and 4 ounces. In only three weighings split 180 ounces of seed in two bags of 40 and 140 ounces. Penny Nom lui répond. |
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Finite differences |
2003-02-10 |
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Jenny pose la question :
I need to find a formula that will work with any number. I am finding the volume of a 3d cross- shape. Here are my results so far:
Term Number 0 1 2 3 4 5
nth term 1 7 25 63 129 231
1rst diff 6 18 38 66 102
2nd diff 12 20 28 36
3rd diff 8 8 8
I can't seem to find a formula that will work with any number. Any help would be much appreciated. Penny Nom lui répond. |
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Three consecutive positive intergers |
2003-02-09 |
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Yew pose la question : Prove that when we multiply any consecutive positive intergers, the result is always divisible by 6.
ex. (7)(8)(9) = 504 = 6 (84) Penny Nom lui répond. |
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AABBBCCCCAABBBCCCC... |
2003-02-09 |
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Patty pose la question : The pattern AABBBCCCCAABBBCCCC continuously repeats. What is the 2003rd letter in the pattern? Please help, I am trying to figure out. Penny Nom lui répond. |
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Millilitres and millimeters |
2003-02-09 |
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Iwan pose la question : I was just wondering whether a millilitre was equal to a millimetre, if not, what is there difference. Penny Nom lui répond. |
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BEDMAS |
2003-02-09 |
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Stefanie pose la question : I do remember the rules of BEDMAS, but for some reason this question puzzles me. 6 X 9 - 3 + 44 I started with the Multiplication 54 - 3 + 44 But then I got stuck, do I proceed with adding the 44 and subtracting the 3 or figure out what -3 + 44 is, but then how would that work with 54?
Penny Nom lui répond. |
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Two investments |
2003-02-07 |
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A student pose la question : you have $7200 in principal and invest different sums @ 10% and 14%. You receive 920 at end of term. (one year)What amounts are invested at what rate? Penny Nom lui répond. |
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The area of an isoceles triangle |
2003-02-07 |
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A student pose la question : I have to find the area of an isoceles triangle with one angle side of 30 degrees, and length of base 5. Could you please help me solve this problem? Penny Nom lui répond. |
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