1. 1st divide to half take the heavier out- ]0 z3 _4 r1 O8 J. A: {
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) 2 t( |; I: w6 f; G& V' ?公仔箱論壇3. Same method if is not equal on 2nd try.