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divde the 12 balls into 3 sets of 4.
- @9 N! N2 Z/ U9 u5 z0 T8 t0 A公仔箱論壇weight any 2 sets.
) G# e3 t1 j4 Z5.39.217.77if the 2 sets are equal, then you know the heavy one is in the third! T8 \/ t: O  h
if one of the 2 is heavier, then the heavy one is in that set
0 o8 v$ C$ D. O7 Mthen divide the 4 balls into 2.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。  N& L2 L, X3 q3 U  \5 v
weigh themtvb now,tvbnow,bttvb" p3 r2 _9 |$ K! l5 |) n. C8 F# j
and divide the heavier into 1tvb now,tvbnow,bttvb' ?* y) _4 B. g
and weight them.
. R; n$ i3 B7 m+ t# d$ }0 VTVBNOW 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.  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。1 Z( ?- G+ p! H' h. f$ N5 |
in less than 15 secs.