Divide the 12 balls into 4 groups of 3's. 1 K* A) Y l; Y. h( i, V2 b公仔箱論壇Weigh group 1 & 2 - P2 f! t r2 B% [* y# Cthen weigh group 2 & 3 & F2 T8 m1 h9 L h. P公仔箱論壇If the results are Equal & Equal, it means the ball with the different weight is in group 4. & j2 ?; E' Y H% k# v6 xIf the results are Equal & Unequal, it means the ball is in group 3.5.39.217.77; z( p. Q7 Q( y5 n2 H" @; b
If the results are Unequal & Equal, it means the ball is in group 1.公仔箱論壇# L, @2 L2 ?& t8 r X* r
If the results are Unequal & Unequal, it means the ball is in group 2.公仔箱論壇4 Z& i+ B& D! u+ w2 {* a+ |3 F# p
tvb now,tvbnow,bttvb+ c. _: P+ U) @# H# Q
Once you determine the group that contains the ball.5.39.217.776 A2 y% g+ C0 ~7 U
Simply weigh two of the balls