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

來源: ^V^ 於 2009-09-19 14:57:38 [] [博客] [舊帖] [給我悄悄話] 閱讀數 : (0 bytes)

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• This is the correct answer -小兔子123- ♀ 給 小兔子123 發送悄悄話 小兔子123 的博客首頁 (0 bytes) () 09/29/2009 postreply 00:14:04

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