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题库 / Prep2007E1-DS-150
If a, b, k, and m are positive integers, is ak a factor of bm ?
(1) a is a factor of b.
(2) k ~$\leq $~ m
Statement (1) ALONE is sufficient, but statement (2) alone is not sufficient.
Statement (2) ALONE is sufficient, but statement (1) alone is not sufficient.
BOTH statements TOGETHER are sufficient, but NEITHER statement ALONE is sufficient.
EACH statement ALONE is sufficient.
Statements (1) and (2) TOGETHER are NOT sufficient.
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假设B=6, A=2, 2 是个的因子 ， M=2, K=4, 则条件不成立。 必须保证B的乘积各项都是A的倍数才行，所以K必须小于或等于M。