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發表於 2008-10-30 11:51 PM
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回應 MagicAndy 第 1 篇文章
| very easy 1st divided into 2 piles of 6,then use the heavy side divided into 2 pile of 3, then use the heavy side to take any 2 to weigh, the heavy side is the one ,and if equal then the remain one is the correct ball. |
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