If n is the product of the integers from1 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
Answer:
简直没法活了,这道题我看了半天,也觉得没有正确答案,不是说1到20的整数的乘积的因子么?
则么可能最大的因子是36呢?
请大家看看
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