Divide the 12 balls into 4 groups of 3's.) z$ F, o. z! u, t5 t# n* h
Weigh group 1 & 2
/ R) N: Z+ ^! R1 j: b- E公仔箱論壇then weigh group 2 & 3
; u! ?; G* `1 x+ k7 X1 U; z& Z. E公仔箱論壇If the results are Equal & Equal, it means the ball with the different weight is in group 4.公仔箱論壇% e, L5 W$ z, Q- r
If the results are Equal & Unequal, it means the ball is in group 3.
; \6 Q% `* H! E* f/ u3 utvb now,tvbnow,bttvbIf the results are Unequal & Equal, it means the ball is in group 1.tvboxnow.com9 H; p5 `$ p; u* X7 K
If the results are Unequal & Unequal, it means the ball is in group 2.
' B0 l, ^5 J9 ^& ktvb now,tvbnow,bttvb
! A/ ^' ^8 l w4 v- E5 H9 Wtvb now,tvbnow,bttvbOnce you determine the group that contains the ball.* ]4 I' H( Y Q" b6 i3 {) R5 C9 ~* N
Simply weigh two of the balls |