take 4 balls as a group, 3 groups - A B C
- z% @( A8 L; V3 mweigh A & B (ex. B heavier)公仔箱論壇' d1 N7 @5 x9 i8 \" c* \" [$ v
then weigh B & C (B & C same weight)
0 c1 [8 r2 w/ F8 `4 `1 B5.39.217.77to find which group has the weight difference and find out is it (A is lighter)! j' j0 h7 e9 K1 c
heavier or lighter
9 L2 X3 z# B, F( T5.39.217.77then measure 2 vs 2 balls, EF vs GH, pick out the lighter group (EF lighter)
; h0 V$ `/ C% d5 E5.39.217.77measure E vs F to find which 1 is lighter.... |