4 times are enough for4 2 ,but you need 5 times.

Jinjing · 2010-05-02 14:03:37Z

4 times are enough for4 2 ,but you need 5 times.簡介

來源: Jinjing 於 2010-05-02 14:03:37 [檔案] [舊帖] [給我悄悄話] 本文已被閱讀：次 (109 bytes)

回答: 用天平稱39個乒乓球由 Blue_Diamond 於 2010-05-01 21:01:19

Welcome you back,your formula are quite good,but can improve.If 3 for 13 were wrong,I would be totally wrong.

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