take 4 balls as a group, 3 groups - A B C5.39.217.76$ {0 T, M* Q7 K/ P! X
weigh A & B (ex. B heavier)5.39.217.76 l7 z/ ^( K p! Y& S+ ^ ^4 [
then weigh B & C (B & C same weight)5.39.217.76# M0 e# v) Q% z9 E7 d. s( I2 Q
to find which group has the weight difference and find out is it (A is lighter)5.39.217.76( f' K7 j: F9 V+ x/ F
heavier or lightertvb now,tvbnow,bttvb8 K" g0 d8 b" \1 s1 g; Q1 n
then measure 2 vs 2 balls, EF vs GH, pick out the lighter group (EF lighter)公仔箱論壇* h, q4 w' c- v! a/ v
measure E vs F to find which 1 is lighter.... |