It is a very old math puzzle.

thinkout · 2012-02-27 10:16:25Z

It is a very old math puzzle.简介

来源: thinkout 于 2012-02-27 10:16:25 [档案] [博客] [旧帖] [给我悄悄话] 阅读数 : (0 bytes)

回答: 【刘谦的魔术】违反数学基本原理的魔术由竞选于 2012-02-07 13:18:44

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