Divide the 12 balls into 4 groups of 3's.: _( K& @3 U+ j, C2 R# t! q
Weigh group 1 & 2 & o- t5 U& L3 C* \; W# f: |9 y( E3 z! stvb now,tvbnow,bttvbthen weigh group 2 & 3 % v+ u& a5 ^$ b1 y6 ]/ ~ mIf the results are Equal & Equal, it means the ball with the different weight is in group 4.# S9 j4 j( t G2 W
If the results are Equal & Unequal, it means the ball is in group 3. ; m" c+ q# Q: z# _& R! m6 `If the results are Unequal & Equal, it means the ball is in group 1.8 I" i& L* i a
If the results are Unequal & Unequal, it means the ball is in group 2.www3.tvboxnow.com7 M5 D7 R5 u" i2 v" ~
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Once you determine the group that contains the ball.www3.tvboxnow.com _$ T& |( C% z# P: Y
Simply weigh two of the balls