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# 12! /2^M is an integer.. whats the maximum value of M?

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12! /2^M is an integer.. whats the maximum value of M?  [#permalink]  09 Oct 2003, 15:30
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12! /2^M is an integer.. whats the maximum value of M?

EDIT : " MAXIMUM VALUE"

Last edited by Praetorian on 09 Oct 2003, 17:08, edited 1 time in total.
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[#permalink]  09 Oct 2003, 16:37
M = 10?

Count the number of 2's that can go into all the even numbers, leaving prime factors, in 12!
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[#permalink]  14 Oct 2003, 00:45
12! includes:

numbers divisible by 2) 6 items
numbers divisible by 4) 3 items
numbers divisible by 8) 1 item

6+3+1=10, so 2^10 is a maximal power of 2 that 12! contains.
[#permalink] 14 Oct 2003, 00:45
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# 12! /2^M is an integer.. whats the maximum value of M?

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