Divide the 12 balls into 4 groups of 3's. 5 A& e% p' V, X/ Y& e$ d) R5.39.217.76Weigh group 1 & 2 T% g. q- P E+ Z公仔箱論壇then weigh group 2 & 33 @' n+ P4 b J$ ]8 G8 w; R
If the results are Equal & Equal, it means the ball with the different weight is in group 4.5.39.217.76% X! V7 F6 |* C& D. i
If the results are Equal & Unequal, it means the ball is in group 3.; i! {* S5 |% ]6 M4 H
If the results are Unequal & Equal, it means the ball is in group 1.tvb now,tvbnow,bttvb0 Z" G5 F, q) J5 E" [
If the results are Unequal & Unequal, it means the ball is in group 2.1 t, a8 [) \9 C
公仔箱論壇( j/ o% W7 y! {2 l
Once you determine the group that contains the ball. , i- N# e$ S0 q7 q& L5 E- T& \: y; V% ?. Etvb now,tvbnow,bttvbSimply weigh two of the balls