take 4 balls as a group, 3 groups - A B C公仔箱論壇: C: R/ h$ E8 N2 r" d/ b
weigh A & B (ex. B heavier)公仔箱論壇7 A& U; m# P0 [4 I, G
then weigh B & C (B & C same weight)
: {9 g# F7 W+ c5 q p# ~to find which group has the weight difference and find out is it (A is lighter)
, A4 u' t( U, ?" j7 x. C6 y: u4 u& [公仔箱論壇heavier or lightertvb now,tvbnow,bttvb/ ? S' x, ?; p6 V
then measure 2 vs 2 balls, EF vs GH, pick out the lighter group (EF lighter)
7 @. c& h6 w6 V; B8 J9 |measure E vs F to find which 1 is lighter.... |