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请教几道PREP题

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楼主
发表于 2008-9-9 10:34:00 | 只看该作者

请教几道PREP题

1.For every positive integer n, the function h(n)is defined to be the product of all the ever intergers for 2 to n.if p is the smallest prime factor of h(100) +1,then p is

答案是〉40

偶怎么想都没想明白

2,on a certain tour, the ratio of the number of the women to the children is 5:2,what was the number of men on the tour?

(1)the ratio of the number of the children to the number of the men was 5:11

(2)the number of the women was less than 30

答案是C,条件2明明没给出具体的数值,怎么能算出来啊 

沙发
发表于 2008-9-9 11:16:00 | 只看该作者
第一题前面已经讨论过了.第二题,人不能是小数,所以最后应该是25,10,22
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