Divide the 12 balls into 4 groups of 3's. % w4 p" {( W! v$ d2 Z公仔箱論壇Weigh group 1 & 2 : }8 Y, ]- C9 t5 q4 m8 othen weigh group 2 & 3" Q' v/ X u2 Q L( D [2 k# m+ x
If the results are Equal & Equal, it means the ball with the different weight is in group 4.os.tvboxnow.com7 l L9 K0 |* f; B" W2 E
If the results are Equal & Unequal, it means the ball is in group 3. + c2 f2 e0 a- ^3 W4 k3 Kos.tvboxnow.comIf the results are Unequal & Equal, it means the ball is in group 1. 5 n+ v0 B- b$ a( ]6 S5 c( @公仔箱論壇If the results are Unequal & Unequal, it means the ball is in group 2.: \8 T, X4 Y! r% N4 {3 Q: ^
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Once you determine the group that contains the ball., O m. g9 A$ M, F
Simply weigh two of the balls