Divide the 12 balls into 4 groups of 3's. & Q& f% r3 g& o3 _, h& `Weigh group 1 & 2 ! e% W3 f. V" M3 S5 `0 ptvb now,tvbnow,bttvbthen weigh group 2 & 3 " y& I# C6 [7 M$ w- P公仔箱論壇If the results are Equal & Equal, it means the ball with the different weight is in group 4.www.tvboxnow.com6 `$ e% s% x6 Q6 o% X$ X9 ?
If the results are Equal & Unequal, it means the ball is in group 3.公仔箱論壇; m5 j9 u: U3 I/ W
If the results are Unequal & Equal, it means the ball is in group 1. # A% x$ c$ H; ^: ^tvb now,tvbnow,bttvbIf the results are Unequal & Unequal, it means the ball is in group 2. # @& C s" A- o, y+ g3 @+ P # r J( o/ k( u% {Once you determine the group that contains the ball. 8 t, ~2 |# l+ d& l5 Y5 n4 B+ ZSimply weigh two of the balls