24-03-2016
Mathematics

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choose a number between 61 and 107 that is a multiple of 3 , 9 and 12

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olemakpadu olemakpadu

24-03-2016

Let us simply find the least common multiple of 3, 9, and 12.

3 / 3 9 12
3 / 1 3 4
4 / 1 1 4
/ 1 1 1

LCM = 3 * 3 * 4 = 36

Let us multiply 36 by 2 = 36*2 = 72

So 72 is a multiple of 3, 9 and 12 and it is in between 61 and 107.

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