1. 1st divide to half take the heavier out5.39.217.77:8898+ [; ~3 D4 j$ z0 {
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) * A* t: @% g* n: w" g公仔箱論壇3. Same method if is not equal on 2nd try.