1. 1st divide to half take the heavier out " K8 Y* a2 U: k5 O4 F' i; P公仔箱論壇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)! [3 n" |3 v2 {1 O5 R4 H
3. Same method if is not equal on 2nd try.