sitsky

take 4 balls as a group, 3 groups - A B C公仔箱論壇+ Z" R0 K1 K% Y" d6 v' u% v
weigh A & B (ex. B heavier)2 i: Z" Z2 n' n; c& ?1 l
then weigh B & C (B & C same weight)2 e7 s3 s% i3 l! z5 f
to find which group has the weight difference and find out is it (A is lighter)$ _0 P8 w* G, \' Z
heavier or lighter
% K6 O( o9 K, c3 L公仔箱論壇then measure 2 vs 2 balls, EF vs GH, pick out the lighter group (EF lighter)公仔箱論壇; c/ @- u% m) j; Y
measure E vs F to find which 1 is lighter....