klleung72781

Divide the 12 balls into 4 groups of 3's.
9 X) v& N7 k9 a: y8 QWeigh group 1 & 2
- C, w, J! c, B- s6 qthen weigh group 2 & 3
5 M( @  z5 s, `( ?4 ?( k5.39.217.77If the results are Equal & Equal, it means the ball with the different weight is in group 4., a3 ^- f+ T3 z
If the results are Equal & Unequal, it means the ball is in group 3.tvb now,tvbnow,bttvb! h- t3 S5 `* s, m2 j
If the results are Unequal & Equal, it means the ball is in group 1.tvb now,tvbnow,bttvb. `' ]. y/ x5 c
If the results are Unequal & Unequal, it means the ball is in group 2.
; v: l3 f- T! u2 y* @5.39.217.77. ^* l' K- ?1 z( w9 N
Once you determine the group that contains the ball.tvb now,tvbnow,bttvb; }8 m0 y2 R8 W) |% d
Simply weigh two of the balls