1. 1st divide to half take the heavier out 6 v$ _7 [" _- M4 ?# ros.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) 6 z+ y9 {0 N4 f ~公仔箱論壇3. Same method if is not equal on 2nd try.