Group them in three each. Weigh twice. Then...

来源: ^V^ 于 2009-09-19 14:57:38 [] [博客] [旧帖] [给我悄悄话] 阅读数 : (0 bytes)

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• This is the correct answer -小兔子123- ♀ 给 小兔子123 发送悄悄话 小兔子123 的博客首页 (0 bytes) () 09/29/2009 postreply 00:14:04

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