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[Data Sufficiency]

试题详情

题目:

What is the greatest common divisor of positive integers m and n ?
(1)m is a prime number.
(2)2n = 7m

选项:

A、Statement (1) ALONE is sufficient, but statement (2) alone is not sufficient.
B、Statement (2) ALONE is sufficient, but statement (1) alone is not sufficient.
C、BOTH statements TOGETHER are sufficient, but NEITHER statement ALONE is sufficient.
D、EACH statement ALONE is sufficient.
E、Statements (1) and (2) TOGETHER are NOT sufficient.

答案:

C

提问:

提问徐小梅老师,这道题题库里面没有每次遇到这种类型的题目,就老是在纠结,他是选b还是选c?因为我觉得如果把条件一和条件二合起来,它们的公共部分是一,所以也是一个确定的答案,虽然条件二也是一个确定的答案,那为什么不能选他们合起来的那一个c呢?

解答:

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解答: 徐小梅老师

提问:

这个(1)为什么不行呢?

解答:

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解答: 徐小梅老师

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