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.
条件1:如果K=2的时候,个数和k是其他prime是不一样的。
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