Divide the 12 balls into 4 groups of 3's.
# N* {" t, {& C4 [/ y6 E4 a5.39.217.76Weigh group 1 & 2
( G: \6 U2 f! O h* }' R7 x5.39.217.76then weigh group 2 & 3
9 |& J2 |0 z5 L N/ c# [7 c8 [- UIf the results are Equal & Equal, it means the ball with the different weight is in group 4.
w0 @% h) O! ?2 KIf the results are Equal & Unequal, it means the ball is in group 3.
' ]4 @0 }. H8 i: ^$ [# E7 otvb now,tvbnow,bttvbIf the results are Unequal & Equal, it means the ball is in group 1.
7 Y- ^, {0 o" ~9 r7 {8 F4 i公仔箱論壇If the results are Unequal & Unequal, it means the ball is in group 2.
' U# c' E* \% k7 H# `& S/ Y8 C# e# F& K, v, m) b9 C; f
Once you determine the group that contains the ball.
* B( @% v( g6 Z5 Ytvb now,tvbnow,bttvbSimply weigh two of the balls |