sitsky

take 4 balls as a group, 3 groups - A B C
2 \3 B  G7 g: J* X* B* t* Q公仔箱論壇weigh A & B (ex. B heavier)5.39.217.77:8898: ]) Y  W' \3 p& D0 }1 I% n
then weigh B & C (B & C same weight)) X1 A( K4 o- k* x
to find which group has the weight difference and find out is it (A is lighter)公仔箱論壇+ }; t# c( r- v1 x# e3 v5 r
heavier or lighter
2 U: ]7 k8 F- M; t  b9 _公仔箱論壇then measure 2 vs 2 balls, EF vs GH, pick out the lighter group (EF lighter)# z2 v# y( T# c/ X! ?- W
measure E vs F to find which 1 is lighter....