Divide the 12 balls into 4 groups of 3's.os.tvboxnow.com, R4 E1 o: Y; B) n8 P. p
Weigh group 1 & 2os.tvboxnow.com+ U }. y6 J: [6 Z7 E6 ?: @$ C: N% d; o
then weigh group 2 & 3公仔箱論壇 ]- U* f8 ~4 Y( M2 t
If the results are Equal & Equal, it means the ball with the different weight is in group 4. - b8 j0 r2 X3 A1 @* Tos.tvboxnow.comIf the results are Equal & Unequal, it means the ball is in group 3.tvb now,tvbnow,bttvb4 P, q9 d' m2 G- t8 k3 \7 q
If the results are Unequal & Equal, it means the ball is in group 1. ; z9 D; \# c$ B% |( J6 dIf the results are Unequal & Unequal, it means the ball is in group 2.. R6 U( V8 V& `: [( a
os.tvboxnow.com) x. ?! i1 r& C0 W
Once you determine the group that contains the ball.% @# H4 J! f% K
Simply weigh two of the balls