1. 1st divide to half take the heavier out % i# j( a8 \+ q/ ]7 f5.39.217.772. 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) : Q6 m+ ]) G0 e% b8 i+ [公仔箱論壇3. Same method if is not equal on 2nd try.