Divide the 12 balls into 4 groups of 3's. ) T+ f. [: J* C" ` d5 t5.39.217.77Weigh group 1 & 2 0 K1 `4 j3 C# u0 G$ A. ^5 D0 A' c5.39.217.77then weigh group 2 & 3 * X, o+ A! U9 a/ `0 L5.39.217.77If the results are Equal & Equal, it means the ball with the different weight is in group 4.5 U( s9 J( d- q* j$ ?! w4 d- m! x
If the results are Equal & Unequal, it means the ball is in group 3.tvb now,tvbnow,bttvb9 M9 Y3 ]0 L3 d" I
If the results are Unequal & Equal, it means the ball is in group 1. 0 [) o7 ~0 T( s C! Y6 w XIf the results are Unequal & Unequal, it means the ball is in group 2.公仔箱論壇+ B* g4 T- t2 R4 |( n$ u
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Once you determine the group that contains the ball. 2 ] i3 H$ S0 T" O1 q$ JSimply weigh two of the balls