sitsky

take 4 balls as a group, 3 groups - A B C: Z/ d! r  L& l' |, x6 t% q
weigh A & B (ex. B heavier); m8 J, c7 `" L! d7 Z- K' M
then weigh B & C (B & C same weight)
. @. {" w3 a$ Hto find which group has the weight difference and find out is it (A is lighter)
4 G6 A! `; J& nheavier or lightertvb now,tvbnow,bttvb/ c& b$ ~; [; Z
then measure 2 vs 2 balls, EF vs GH, pick out the lighter group (EF lighter)
" ~- k; }0 O: V' e公仔箱論壇measure E vs F to find which 1 is lighter....