1. 1st divide to half take the heavier out 7 ~% Z% Y3 C. P5 Q5.39.217.762. 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* U$ _% W! m# r
3. Same method if is not equal on 2nd try.