Divide the 12 balls into 4 groups of 3's. : M5 _5 r6 C1 L% Y2 l5.39.217.76Weigh group 1 & 2 7 J4 F7 S! I6 s6 Q2 N5.39.217.76then weigh group 2 & 3% h) H( J& B2 P1 T. D a
If the results are Equal & Equal, it means the ball with the different weight is in group 4. ; E- d- j( q; `! t- l/ `tvb now,tvbnow,bttvbIf the results are Equal & Unequal, it means the ball is in group 3. 8 j' V* | r& G( x& o2 o$ [; ~) n( z5.39.217.76If the results are Unequal & Equal, it means the ball is in group 1.公仔箱論壇& l" ]& ]( B! |8 Z2 ?( V
If the results are Unequal & Unequal, it means the ball is in group 2. . \- A6 B, z1 }2 c5.39.217.76$ Q6 F% ~2 D M1 @7 @
Once you determine the group that contains the ball. & @& \7 ]) D6 R+ ltvb now,tvbnow,bttvbSimply weigh two of the balls