返回列表 发帖

which should I choose?

某人有bookcase, arrange 10 books per shelf and no books left. If he acquired 10 additional books, and arrange 12 books per shelf, no books left. Ask how many books he has before acquiring the addition 10 books
1) before acquiring, his books less than 96
2) before acquiring, his books more than 24
which should I choose?
Thank you very much
收藏 分享

条件1可以,条件2不可以。设原来有书x本,从题目得x/10和(x+10)/12都是整数。安条件1可以得出x=50;而条件2可以得出很多结果,x=50,110,170等等很多。
把所有的困苦都看做是有意义的,是生命对你的磨练,也许,是为了让你成大事而做准备。

TOP

厉害,感谢了!!

TOP

返回列表

站长推荐 关闭


美国top10 MBA VIP申请服务

自2003年开始提供 MBA 申请服务以来,保持着90% 以上的成功率,其中Top10 MBA服务成功率更是高达95%


查看