take 4 balls as a group, 3 groups - A B C
; W( P- h ~6 l& Y1 O, a5.39.217.76weigh A & B (ex. B heavier)
0 g- L7 R) D- |/ dtvb now,tvbnow,bttvbthen weigh B & C (B & C same weight)
+ x: M L {& A" Eto find which group has the weight difference and find out is it (A is lighter)
8 w3 i5 g( s2 j6 I/ R8 `1 j公仔箱論壇heavier or lightertvb now,tvbnow,bttvb( J8 R6 J, i/ w" F
then measure 2 vs 2 balls, EF vs GH, pick out the lighter group (EF lighter)6 Q* {* ]6 @1 l
measure E vs F to find which 1 is lighter.... |