divde the 12 balls into 3 sets of 4.
9 Z& _2 j$ x% D9 b5 _+ ~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。weight any 2 sets.
8 g; |2 [! ], x: c. l; Y Z% i8 E, @) [公仔箱論壇if the 2 sets are equal, then you know the heavy one is in the third5.39.217.77/ T* t6 i8 `( F9 q( j" D: T! D6 B
if one of the 2 is heavier, then the heavy one is in that settvb now,tvbnow,bttvb: |* m! C8 x D5 n. y
then divide the 4 balls into 2.( R/ B* A) y: T" Y* k
weigh them
- @* n: n9 Z2 I+ Z& H: K/ }* t3 Land divide the heavier into 1; K7 E9 d% J6 L: }1 k: @9 B5 @9 T
and weight them.
) t- l3 Y2 [. @! p+ btvb now,tvbnow,bttvb3 x weighing and get the ans.
2 }( \. Q) l- O) Qtvb now,tvbnow,bttvbin less than 15 secs. |