1. 1st divide to half take the heavier out , I( }; r% z# j3 r) u& ^: zwww2.tvboxnow.com2. 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) ' M+ M. T- Z1 V2 U/ d公仔箱論壇3. Same method if is not equal on 2nd try.