求助一道PREP

jessiecg · 发表于 2010-12-30 09:29:55

60.Does the integer k have a factor p such that 1 < p < k ?

(1) k > 4!

(2) 13! + 2 <k <13! + 13

答案是B。
我明白1肯定不对，但对2不是很理解。。求帮忙~

sdcar2010 · 发表于 2010-12-30 09:35:30

2) k = 13! + m, whereas m = 3, 4, 5, 6, 7, 8, 9, 10, 11, 12. Then m must be a factor of 13! Then k = m*(13!/m + 1). So m is a factor of k, 2<m<13<13!<k

m is the p you want.

jessiecg · 发表于 2010-12-30 10:11:41

您果然是神人~
膜拜一下~谢谢！

小困蛇 · 发表于 2010-12-30 10:23:15

Totally forgot how to solve this kind of pro。 sd..'s orientation is like a flash!!! ai....

求助一道PREP

所属分类: GMAT考试

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