求教两道PREP的DS题~！怀疑答案错啊。。

awronist

太郁闷了这两个题，完全觉得答案没道理啊，请高人指点。

The integers m and p are such that 2 < m < p and m is not a factor of p. If r is the remainder when p is divided by m, is r > 1 ? (1) The greatest common factor of m and p is 2. (2) The least common multiple of m and p is 30. 答案是A 我的疑问：我觉得第二个可以判断啊。此时似乎只有两种可能m=3，p=10或者m=5,p=6啊。这两种情况余数r都是1啊，也就判断了不大与1了么不是。 One kilogram of a certain coffee blend consists of x kilogram of type I coffee and y kilogram of type II coffee. The cost of the blend is C dollars per kilogram, where C = 6.5x + 8.5y. Is x < 0.8 ? (1) y > 0.15 (2) C >= 7.30 答案给的是B。完全不明白为什么不是E。。。

awronist

自己顶一个。。牛人帮忙啊