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發表於 2011-11-4 12:49 AM
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1. 1st divide to half take the heavier out5.39.217.77; X9 c O' z! m6 U& Y. F! Z
2. 2nd take 4 balls out of 5 divide 2 groups to get the heavier out. (if is equal thn the remain is the one u looking for)# R9 X Q- U! G5 }" o, o
3. Same method if is not equal on 2nd try. |
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