作者oranger (从新出发)
看板GMAT
标题[计量] pp ds2 183
时间Tue Sep 9 23:54:00 2008
183.
If m is a positive odd integer between 2 and 30, then m is divisible by how
many different positive prime numbers?
(1) m is not divisible by 3.
(2) m is not divisible by 5.
Ans: A
我选D耶 因为我觉得都可以列出来所以都可以算
不知道是哪里理解错误了, 请高人指点~~ 谢谢
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1F：推 santa:只考虑条件2时,m可以等於3 or 3x7 无法判断有几个质因数 09/10 00:23
2F：→ oranger:原来如此 了解了 谢谢!! 09/11 23:35