ceteriz

divde the 12 balls into 3 sets of 4. 2 h1 X4 T* X; m/ S0 `* n
weight any 2 sets.
0 D$ j9 _/ ^8 O- [7 P6 a+ {+ V公仔箱論壇if the 2 sets are equal, then you know the heavy one is in the thirdTVBNOW 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。4 |8 o3 X. `* F5 i* E
if one of the 2 is heavier, then the heavy one is in that set
8 w6 m9 a7 O. ]: Z9 ?5 @5.39.217.76then divide the 4 balls into 2.
. _) Q7 M0 c8 R  k. d* r: W  Z& `* E; Z9 d) wtvb now,tvbnow,bttvbweigh them
  |9 I6 P" X; E  z5.39.217.76and divide the heavier into 1
4 n, m# o* \/ X$ Ptvb now,tvbnow,bttvband weight them.
, |1 _) H! ^5 ^5 I+ F( s9 P0 V3 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。: A5 Z. @+ f2 d  Q! \
in less than 15 secs.