sitsky

take 4 balls as a group, 3 groups - A B C
( S! s; G8 Q# q6 E* A4 M公仔箱論壇weigh A & B (ex. B heavier)公仔箱論壇% {3 x9 y# q9 b
then weigh B & C (B & C same weight)/ P8 z* N" o, g
to find which group has the weight difference and find out is it (A is lighter)tvb now,tvbnow,bttvb$ \, w) ^/ ^; r2 x4 Z
heavier or lighter
% I$ P* ?2 C0 C: g+ M公仔箱論壇then measure 2 vs 2 balls, EF vs GH, pick out the lighter group (EF lighter)
6 O) ^  p+ h2 U) C3 @公仔箱論壇measure E vs F to find which 1 is lighter....