sitsky

take 4 balls as a group, 3 groups - A B CTVBNOW 含有熱門話題，最新最快電視，軟體，遊戲，電影，動漫及日常生活及興趣交流等資訊。8 k  f8 {# `2 S
weigh A & B (ex. B heavier)公仔箱論壇$ ?5 I9 p% X1 n, W6 D$ \
then weigh B & C (B & C same weight)
: b& V+ ~3 `" |TVBNOW 含有熱門話題，最新最快電視，軟體，遊戲，電影，動漫及日常生活及興趣交流等資訊。to find which group has the weight difference and find out is it (A is lighter): H* M$ [6 S: ~" l6 b& }/ R
heavier or lighter
5 [. U$ M# o( }0 ~, U+ X' `& sthen measure 2 vs 2 balls, EF vs GH, pick out the lighter group (EF lighter)" @0 K5 N( U& p3 k. Y; u
measure E vs F to find which 1 is lighter....