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Divide the 12 balls into 4 groups of 3's.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。3 T: z% R( M' r- B% k/ J
Weigh group 1 & 2
- l1 ^1 |$ B( m$ cthen weigh group 2 & 3$ j. Q0 ^0 q1 l2 l7 o0 V
If the results are Equal & Equal, it means the ball with the different weight is in group 4.* v. p  G+ d& ]0 E8 {
If the results are Equal & Unequal, it means the ball is in group 3.
  m5 l- x, e/ u8 r5.39.217.77If the results are Unequal & Equal, it means the ball is in group 1.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。  Y( h% N/ F$ y6 ~! b( o( R
If the results are Unequal & Unequal, it means the ball is in group 2.; \7 K# e( C2 o, h* i

  _' f# G: }$ k1 R$ Z; f' P公仔箱論壇Once you determine the group that contains the ball.
3 ^% a; k! V: {& y: u" t5.39.217.77Simply weigh two of the balls