take 4 balls as a group, 3 groups - A B C
9 u% r2 z1 x6 r( P8 aweigh A & B (ex. B heavier)公仔箱論壇& E+ ~; n! e* K/ ^1 C* {' D/ t
then weigh B & C (B & C same weight)& x# ?" B& A& y$ B( t7 N5 _/ p" J
to find which group has the weight difference and find out is it (A is lighter)
' D" n+ O' f8 Fheavier or lighter
/ c' `$ z" x/ S: } C' e2 Z. z5.39.217.77then measure 2 vs 2 balls, EF vs GH, pick out the lighter group (EF lighter)
. [1 @2 D- w+ R, l5 M9 B: [公仔箱論壇measure E vs F to find which 1 is lighter.... |