ChaseDream
标题:
【求助一道DS题】
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作者:
Joyce74
时间:
2018-1-5 14:29
标题:
【求助一道DS题】
If r and s are positive integers, is r/s an integer?
(1) Every factor of s is also a factor of r.
(2) Every prime factor of s is also a prime factor of r
答案是A
可是条件2为什么不充分呢?
Thanks♪(・ω・)ノ
作者:
kexzhang
时间:
2018-1-5 14:41
举个例子,如果S=2^3*3^2,R=2^2*3^3, R/S=108/72, 这不就不是整数了么
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