Divide the 12 balls into 4 groups of 3's.6 i6 _: T3 n2 O# N) ^
Weigh group 1 & 26 b y7 O$ ~2 C4 Z7 @
then weigh group 2 & 3
$ ]5 [: z% I3 G7 M5 q4 e2 Rtvb now,tvbnow,bttvbIf the results are Equal & Equal, it means the ball with the different weight is in group 4.2 q/ X/ |2 ~0 |, w
If the results are Equal & Unequal, it means the ball is in group 3.tvb now,tvbnow,bttvb9 g! ^+ r" Q3 g$ R) k% s p
If the results are Unequal & Equal, it means the ball is in group 1." z6 N5 H+ l) i/ F5 [) v) H3 X) t
If the results are Unequal & Unequal, it means the ball is in group 2.os.tvboxnow.com+ A4 Y" R- t5 A) a6 _2 S
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Once you determine the group that contains the ball.os.tvboxnow.com/ u, M0 B5 m4 |) @
Simply weigh two of the balls |