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题库 / Prep2007E2-DS-32
Is positive integer n divisible by 3 ?
(1) ~$\frac{n^{2}}{36}$~ is an integer.
(2) ~$\frac{144}{n^{2}}$~ is an integer.
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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只要有144的因子就可以了，不一定可以被3整除
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