1. 1st divide to half take the heavier out ) g# p% i/ F4 ^7 @5 N5.39.217.762. 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) 1 E# f5 `( s7 z4 u1 c, L1 D; O公仔箱論壇3. Same method if is not equal on 2nd try.