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divde the 12 balls into 3 sets of 4. 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。8 O- \' T9 P( o, f- K! O
weight any 2 sets.
) j* R6 F) K& S# Z2 Q5.39.217.76if the 2 sets are equal, then you know the heavy one is in the third
9 a" d# u% J6 x  ~4 o% W7 W1 Fif one of the 2 is heavier, then the heavy one is in that set
/ K/ O& O) j- l  }tvb now,tvbnow,bttvbthen divide the 4 balls into 2.
' ^0 f: W9 x% v$ q9 H6 R1 sweigh them公仔箱論壇, D5 k# E# \$ p
and divide the heavier into 1
/ [7 N$ E7 f9 G! G5 yTVBNOW 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。and weight them.tvb now,tvbnow,bttvb+ J% q8 T" P6 @  y
3 x weighing and get the ans.  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。2 \$ P! z; {- h; W3 [$ ^% j
in less than 15 secs.