1. 1st divide to half take the heavier out . j, G. _3 V6 A% H ?) m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) 2 J- _) A. Q4 P4 n% y3 \7 }公仔箱論壇3. Same method if is not equal on 2nd try.