Divide the 12 balls into 4 groups of 3's.
8 q# w* U% S( ^7 V1 Q r5 }" f2 ~tvb now,tvbnow,bttvbWeigh group 1 & 2
/ |5 r8 E6 J* k9 ?4 O0 l+ }tvb now,tvbnow,bttvbthen weigh group 2 & 3
5 w$ ^. u3 |* S& J0 X" B9 YIf the results are Equal & Equal, it means the ball with the different weight is in group 4.tvb now,tvbnow,bttvb, o( ]% e1 T# C2 H1 M& n
If the results are Equal & Unequal, it means the ball is in group 3.tvb now,tvbnow,bttvb3 i/ B% n" `3 C' q
If the results are Unequal & Equal, it means the ball is in group 1.! ?' o, ~- o8 j" \+ f& N+ X0 l# s
If the results are Unequal & Unequal, it means the ball is in group 2.
/ f! t& m6 s8 l& f% l5.39.217.77:8898
- S: }7 V" Y# m* p7 S5.39.217.77:8898Once you determine the group that contains the ball.2 E; t6 S: ^9 P3 q& `
Simply weigh two of the balls |