sitsky

take 4 balls as a group, 3 groups - A B C
% r( J' r  t) w: u: a* k公仔箱論壇weigh A & B (ex. B heavier)- I; D: `8 Z( X* v* }6 o' ~
then weigh B & C (B & C same weight)公仔箱論壇, i) b, e+ z: A; L! U
to find which group has the weight difference and find out is it (A is lighter)
& w* k. ?2 O' Z5.39.217.77heavier or lighter
/ I% ^( r$ `! \0 O# B3 O' lthen measure 2 vs 2 balls, EF vs GH, pick out the lighter group (EF lighter)公仔箱論壇' I# {3 F4 Y6 e- c7 O# B7 G# g
measure E vs F to find which 1 is lighter....