anakmalas

this is too easy!!公仔箱論壇+ y+ w! m; ?( W

/ Z- M% ~% x% H1. put 6 at each side.. take the one side which is heavier
2 q/ W7 ^# L: i3 F/ b2. put 3 at each side.. also take the heavier side5.39.217.77:88983 k  T; q7 v/ @9 V
3. put 1 at each side.. if the weight balance then the one not put inside is the heavy ball.. else the side which is heavier is the heavier ball..