Divide the 12 balls into 4 groups of 3's. . `% k2 ?) H! H, P0 I# H) Utvboxnow.comWeigh group 1 & 2 " |5 X; s* |0 N- d# q. z9 N- Ctvb now,tvbnow,bttvbthen weigh group 2 & 3 ; G) c* K3 i2 g& [* pIf the results are Equal & Equal, it means the ball with the different weight is in group 4. . ]: s! Z; S/ oIf the results are Equal & Unequal, it means the ball is in group 3. : a8 U- f0 h* }7 E6 U6 x y3 rIf the results are Unequal & Equal, it means the ball is in group 1. . N# D5 a6 C' E; ?, X& btvboxnow.comIf the results are Unequal & Unequal, it means the ball is in group 2. 6 [& c8 Q$ D% f v9 J6 [ ' A6 Y( a! D# {/ V# \公仔箱論壇Once you determine the group that contains the ball.公仔箱論壇& f$ S; c" p% ?+ q* z }6 B6 B8 C
Simply weigh two of the balls