1. 1st divide to half take the heavier out# H, M/ Z; F; H' G4 D, z
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 S. y+ a3 U8 i' g/ t
3. Same method if is not equal on 2nd try.