Divide the 12 balls into 4 groups of 3's. 2 c( I8 G7 B, P* q( M$ jwww2.tvboxnow.comWeigh group 1 & 2 ( S" m1 I& X7 M. Z1 ^2 ythen weigh group 2 & 3 _2 E7 A4 E( Q" J公仔箱論壇If the results are Equal & Equal, it means the ball with the different weight is in group 4.公仔箱論壇3 j f9 j& v2 ]& M0 Q& Y
If the results are Equal & Unequal, it means the ball is in group 3." ^6 n. C- Z K
If the results are Unequal & Equal, it means the ball is in group 1.tvb now,tvbnow,bttvb' L8 I1 n* d) }7 Q
If the results are Unequal & Unequal, it means the ball is in group 2. ' g- Y& a1 b- h 8 e& K: n. ~) J- ], JOnce you determine the group that contains the ball.公仔箱論壇# c! c* B$ \* n7 S* V
Simply weigh two of the balls