Divide the 12 balls into 4 groups of 3's. * o& Z/ P- p5 j8 k5 Y5.39.217.77:8898Weigh group 1 & 25.39.217.77:8898! V; `# @. U; Q# t- l+ S
then weigh group 2 & 3 % w* x4 e+ Z- N, ]8 s6 xtvb now,tvbnow,bttvbIf the results are Equal & Equal, it means the ball with the different weight is in group 4.5.39.217.77:88983 m! C- M; Q( I6 y1 g
If the results are Equal & Unequal, it means the ball is in group 3. + I9 n: o7 ]! m# n* ?( v" T公仔箱論壇If the results are Unequal & Equal, it means the ball is in group 1. 8 M/ ^. v/ I8 a9 s Q: y: i2 D4 tIf the results are Unequal & Unequal, it means the ball is in group 2.5.39.217.77:88983 i: W& f* j+ ^* g/ v
# K7 V3 X. {" {tvb now,tvbnow,bttvbOnce you determine the group that contains the ball.5.39.217.77:8898. D; _1 k$ ~) h2 a. ~& S7 t9 I
Simply weigh two of the balls