1. 1st divide to half take the heavier out公仔箱論壇! E' O* d$ A; X3 M" x; [3 m$ f
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8 H u4 K8 ^" |9 x) H
3. Same method if is not equal on 2nd try.
發表於 2011-11-1 01:28 PM
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