请教数学大侠们：Counting-off Puzzles

来源: 于 2012-06-19 07:52:21 [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 a 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?