斗牛倍数有99倍的是那个版本

来源：蜘蛛抓取(WebSpider) 时间：2016-07-03 02:10 标签： 爱玩dnf99级版本下载
一个数是99倍的99的99是多少？_百度知道
一个数是99倍的99的99是多少？
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出门在外也不愁99个数排成一行：0,1,3,8,21,…除了两头的两个数以外,每个数的3倍都恰好等于它两边的两个数的和.这99个数中有多少个奇数?
pizza瓶子1739
99个数的奇偶性为偶、奇、奇、偶、奇、奇、偶、奇、奇……99/3=33所以共有33*2=66个奇数
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这个排列有如下规律：0（偶数）1;（奇数）3*1-0=3; （奇数）3*3-1=8; （偶数）8*3-3=21; （奇数）21*3-8=55. （奇数）我们可以发现这组数正好是一个偶数两个奇数循环，69能被3整除，完全循环，所以有三分之二个奇数，即66个
因为奇数的3倍是奇数，偶数的3倍是偶数，所以当排列是a,b,c,d，e时如果a是偶数，b是奇数，则c一定是奇数（奇数-偶数=奇数）由于偶数加奇数是奇数，所以d一定是偶数，那么e就是奇数了所以奇偶的排序是偶，奇，奇，偶，奇，奇。。。所以奇数占的比列是2/3 那么99个中奇数个数就是99*2/3=66个...
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