作者lovekyoko (我在Tamap 天气晴)
看板GMAT
标题[问题] pp2-ds 11,12
时间Mon Oct 5 22:36:39 2009
What is the value of the positive integer m ?
(1) When m is divided by 6, the remainder is 3.
(2) When 15 is divided by m, the remainder is 6.
答案B
我知道A不充分 但B为啥充分阿
我是这样列式的 15=mx+6 变数有2个 这样可以充分吗??
Sets A, B, and C have some elements in common. If 16 elements are in both A
and B, 17 elements are in both A and C, and 18 elements are in both B and C,
how many elements do all three of the sets A, B, and C have in common?
(1) Of the 16 elements that are in both A and B, 9 elements are also in C.
(2) A has 25 elements, B has 30 elements, and C has 35 elements.
答案A
我也知道B不充分 但A哪里有充分??
谢
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1F:推 scuhans:第一题的条件二 m不是只能为九吗 10/05 22:41
2F:推 scuhans:第二题画伟恩图就知道了 在AB中又在C 就是ABC重叠处=9 10/05 22:43
3F:→ lovekyoko:为啥第一题M只能9???谢 10/05 22:44
4F:→ scuhans:M不能小於六 因为余数是六 10/05 22:45