If k is a positive integer, then 20k is divisible by how many different positive integers?
(1) k is prime.
(2) k = 7
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.
这个k不能是20的divisor 比如如果k是2 或者5 就不行了
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