请教：Counting-off Puzzles

来源: 于 2012-06-18 19:44:30 [旧帖] [给我悄悄话] 本文已被阅读：次

这样的问题有规律可寻吗？

25 people are standing in ca circle. Starting with person 1, they count off from 1 to 7 and them start over with 1. Each person who says"7" drops out of the circle. who is the last person left?