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divde the 12 balls into 3 sets of 4. tvb now,tvbnow,bttvb! L6 k, \8 Y7 D' U9 U) r/ N! P
weight any 2 sets.
( C& v5 l( a# v1 G% E1 `if the 2 sets are equal, then you know the heavy one is in the third
7 Z! S% Z' ?2 d2 Ktvb now,tvbnow,bttvbif one of the 2 is heavier, then the heavy one is in that set
2 v% v$ j9 }0 |: J& @7 y2 RTVBNOW 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。then divide the 4 balls into 2.
2 U% E$ v5 q% ]# z( t8 yweigh them
( z( e) u9 k0 a5 F8 Tand divide the heavier into 1
% `- J7 u  F7 u( e2 Ftvb now,tvbnow,bttvband weight them.
* B" a  t2 H6 m* bos.tvboxnow.com3 x weighing and get the ans.  
9 k8 V( t$ n3 l& U# mTVBNOW 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。in less than 15 secs.