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标题: 一道数学题。 [打印本页]

作者: xlnzw 时间: 2009-12-2 15:06
标题: 一道数学题。
If n is the product of the integers from 1 to 20 inclusive, what is the greatest integer K for which 2K is a factor of n ?

A 10 B 12 C 15 D 18 E 20

怎么算啊，这道？？不会耶。。。。。

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