1. 1st divide to half take the heavier out公仔箱論壇+ u' f" i; K+ T/ K" }. }. e
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)公仔箱論壇5 O' h, H$ m0 V$ j) w0 ]
3. Same method if is not equal on 2nd try.
發表於 2011-11-1 01:28 PM
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