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divde the 12 balls into 3 sets of 4.
6 K1 i" R+ p! r9 Q. Y, Pweight any 2 sets.
: a) ]! R2 S6 H! I公仔箱論壇if the 2 sets are equal, then you know the heavy one is in the third" C4 I' e9 a: C
if one of the 2 is heavier, then the heavy one is in that settvb now,tvbnow,bttvb* e  k' ?2 H6 w( t4 h( i. U
then divide the 4 balls into 2.
% i* g" Y# v( P: w/ T8 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。weigh them
6 W2 }1 e! ]" |" }' w* x2 sand divide the heavier into 1
/ ]6 K: M! |1 ]' c, fand weight them.
0 f7 z7 y( ?, V0 i* r' Q7 c3 v! oTVBNOW 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。3 x weighing and get the ans.  
/ i: o6 @: Q4 ]' W( q, l5.39.217.77in less than 15 secs.