1. 1st divide to half take the heavier out 2 M3 e% i& J. U _tvb now,tvbnow,bttvb2. 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 |1 Y8 z- @! x7 T, i. x
3. Same method if is not equal on 2nd try.