Divide the 12 balls into 4 groups of 3's.公仔箱論壇5 b5 y5 Z. S/ o& r( `
Weigh group 1 & 2 : m( x+ G' j1 v r# V5 ?$ ~then weigh group 2 & 33 ?* P2 c+ F% `2 l2 m
If the results are Equal & Equal, it means the ball with the different weight is in group 4. # U2 N: |9 e- K# j- x* ~# a9 y/ ^公仔箱論壇If the results are Equal & Unequal, it means the ball is in group 3. ) @0 |$ {3 L. `! Y/ I6 Itvb now,tvbnow,bttvbIf the results are Unequal & Equal, it means the ball is in group 1.tvb now,tvbnow,bttvb, C S1 C* X( z- \5 N
If the results are Unequal & Unequal, it means the ball is in group 2. 3 v l. D8 W$ C" e9 A* O 5 v# d" T' P: T( G5.39.217.77:8898Once you determine the group that contains the ball. 0 z' P% f8 Z' T O- r' u5.39.217.77:8898Simply weigh two of the balls