1. 1st divide to half take the heavier out+ Z0 n) p n' Y2 c$ Q' t
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3 p' Z& w7 ?2 ^" ?
3. Same method if is not equal on 2nd try.