Divide the 12 balls into 4 groups of 3's.
y9 Y3 W2 _) ` f/ q* j9 {% ^Weigh group 1 & 2. G& p2 X7 A2 s* r
then weigh group 2 & 3
# m5 N3 P5 ?6 u! w" S, a1 pIf the results are Equal & Equal, it means the ball with the different weight is in group 4.
& l) W* {! l$ h5.39.217.76If the results are Equal & Unequal, it means the ball is in group 3.tvb now,tvbnow,bttvb7 H8 c5 n$ [6 D3 R
If the results are Unequal & Equal, it means the ball is in group 1.
1 Y2 V. `. v6 ?+ o) z& cIf the results are Unequal & Unequal, it means the ball is in group 2.
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; o! c2 j6 y' Otvb now,tvbnow,bttvbOnce you determine the group that contains the ball.tvb now,tvbnow,bttvb4 T/ R( |+ X+ Y+ ?8 e" }
Simply weigh two of the balls |