Divide the 12 balls into 4 groups of 3's.& x v% @0 N2 K. p, k& j- i& M
Weigh group 1 & 2公仔箱論壇: [8 {8 l/ e0 @
then weigh group 2 & 3公仔箱論壇) V( W: K+ F6 `4 t2 {0 T
If the results are Equal & Equal, it means the ball with the different weight is in group 4. + L# i: Z7 H5 z: q5 RIf the results are Equal & Unequal, it means the ball is in group 3. 1 z2 N3 H+ E8 k" M8 q$ VIf the results are Unequal & Equal, it means the ball is in group 1.公仔箱論壇7 a6 m- T0 o+ ~' G9 h
If the results are Unequal & Unequal, it means the ball is in group 2. 0 v+ |" j8 M- B" W% I" x" P/ mtvb now,tvbnow,bttvb0 B% u+ S2 w. n/ R# a6 |
Once you determine the group that contains the ball.公仔箱論壇7 s9 F! I# i9 y, C
Simply weigh two of the balls