请教一道数学题

kkbear

There are three ants A, B and C. The ratio of their crawling speed is 8:6:5. They start to crawl along a circle from the same point, at the same time and in the same direction. When they reach the start for the first time synchronously, the crawl is completed. During the process(including the end time), how may times A will catch up with B?

K相忘于江湖

我一个同学做的是2次~~答案是多少？

-- by 会员 christinashao (2010/3/3 21:54:43)

如果是只存在套圈……我也是两次……  lz需要出来只个答案……

christinashao

我一个同学做的是2次~~答案是多少？

K相忘于江湖

话说 大家觉得相遇的情况除了套圈还是别的可能哇…… 有点混乱了

christinashao

怎么做的啊？

切尔西

这个我题应该是4次，不知道答案是多少的
我的理解是当他们一起到达开始那点的时候A,B,C转的圈数分别是8，6，5，然后通过画图演示可以知道在A完成这8圈的过程中只有偶数次圈的时候超过了B，所以算上最后的一次是4次

tiny51pugna

15？