Divide the 12 balls into 4 groups of 3's.
1 V' W, B1 ? F9 | V% {* d' _公仔箱論壇Weigh group 1 & 2tvb now,tvbnow,bttvb; {: |: Z: E" v# X- l T. m. Q5 O+ q
then weigh group 2 & 3os.tvboxnow.com! j4 |' f+ p. f0 ^: J# r* l
If the results are Equal & Equal, it means the ball with the different weight is in group 4.os.tvboxnow.com" [; P Z8 ?6 B0 Y
If the results are Equal & Unequal, it means the ball is in group 3.
/ Q5 d( ]2 |5 k' F1 [ Z4 MIf the results are Unequal & Equal, it means the ball is in group 1.tvb now,tvbnow,bttvb8 D9 Q/ o2 @& \8 J: z. S% f9 h
If the results are Unequal & Unequal, it means the ball is in group 2.公仔箱論壇' O" Q9 J$ v) N9 _& A+ H: S
os.tvboxnow.com7 ?$ q, T; M9 |$ j
Once you determine the group that contains the ball., F u, x: O( T! Z3 D
Simply weigh two of the balls |