klleung72781

Divide the 12 balls into 4 groups of 3's.tvb now,tvbnow,bttvb% H! E, }( N# @" s6 t$ O. ~3 n1 ?
Weigh group 1 & 2
. F, B4 ]' q/ \公仔箱論壇then weigh group 2 & 35.39.217.77:8898, }0 @4 ~0 [2 W* P' p7 G/ f
If the results are Equal & Equal, it means the ball with the different weight is in group 4.
  z! r/ g! u8 t7 u) C( a; YIf the results are Equal & Unequal, it means the ball is in group 3.公仔箱論壇- D0 [2 W6 H* M: q+ q
If the results are Unequal & Equal, it means the ball is in group 1.  z7 }. `0 v) F2 B9 W1 r' b# M
If the results are Unequal & Unequal, it means the ball is in group 2.' p! `. o0 @4 ?% ?# c) u. s: W

& `5 ]# w6 k1 |tvb now,tvbnow,bttvbOnce you determine the group that contains the ball.公仔箱論壇6 {# }- T, m! a) |8 _) ^: ?* x) U
Simply weigh two of the balls