1. 1st divide to half take the heavier out : E/ O' ?- Q2 s$ l" e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)5.39.217.772 e, p7 j/ }( y, b9 d+ i5 {
3. Same method if is not equal on 2nd try.