1. 1st divide to half take the heavier out5.39.217.77$ J! Z, s- q1 k$ B
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 z( |+ N2 L [6 K2 ^& b7 @5 m
3. Same method if is not equal on 2nd try.