求各位大佬两道prep的题~

Yvonne123456 · 发表于 2019-2-19 21:39:51

【PS】For every positive even integer n, thefunction h(n) is defined to be the product of all the evenintegers from 2 to n, inclusive. If p is thesmallest prime factor of h(100) + 1, then p is
【DS】How many odd integers are greater than theinteger x and less than the integer y ?
(1) There are 12 even integers greater than x and lessthan y.
(2) There are 24 integers greater than x and less than y.

sxkbb · 发表于 2019-2-19 22:52:44

第一个不是求具体数字吧，应该是求个范围或者最小值，p>50我解释一下：h(100)=2*4*6*...*100=2^50*50!
所以h(100)可以被50以内的任意正整数整除，也就是说h(100)+1除以50以内的正整数都余1，即不能被50以为的正整数整除
第二个是B吧，条件一的话奇数可能是11,12,13

求各位大佬两道prep的题~

所属分类: GMAT考试

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