sitsky

take 4 balls as a group, 3 groups - A B C
/ \7 q$ ~& k: @# M" j5 E5.39.217.77weigh A & B (ex. B heavier)
0 \- Z1 H/ _. F) c/ Tthen weigh B & C (B & C same weight)
. _8 k+ v. o4 y公仔箱論壇to find which group has the weight difference and find out is it (A is lighter)
. U. A: S+ ?. ^+ r; Qheavier or lighter
8 B4 V2 U6 r5 r, J$ M3 [  ntvb now,tvbnow,bttvbthen measure 2 vs 2 balls, EF vs GH, pick out the lighter group (EF lighter)  j: T) K' S4 b% M
measure E vs F to find which 1 is lighter....