Divide the 12 balls into 4 groups of 3's. # Y- |0 V2 f+ U! p- u5.39.217.77Weigh group 1 & 25.39.217.77% q8 q; N; P1 r! X! L% U9 @
then weigh group 2 & 35.39.217.779 u) J2 R Z5 |* `7 D
If the results are Equal & Equal, it means the ball with the different weight is in group 4. 8 F1 ~. C* |8 A6 d4 k公仔箱論壇If the results are Equal & Unequal, it means the ball is in group 3. / p/ u! ]1 `$ E) {: Ytvb now,tvbnow,bttvbIf the results are Unequal & Equal, it means the ball is in group 1. ' v5 r: @/ F A9 o% dtvb now,tvbnow,bttvbIf the results are Unequal & Unequal, it means the ball is in group 2.tvb now,tvbnow,bttvb6 X% P0 c8 `: z0 v$ U& |8 ^9 e$ v
& v1 b2 S& s! c5 S: q0 J$ y5.39.217.77Once you determine the group that contains the ball. - s! [7 }! k( t" W y& Z公仔箱論壇Simply weigh two of the balls