Divide the 12 balls into 4 groups of 3's.
! c& ?0 W+ a8 p# y* [3 \1 Z, }, ]Weigh group 1 & 25.39.217.76% m6 u4 B4 R& g' L: t3 n7 s! S( q
then weigh group 2 & 3/ n' J! |- X, T! C
If the results are Equal & Equal, it means the ball with the different weight is in group 4.
, ?$ }7 [( ]' g, ]. _; VIf the results are Equal & Unequal, it means the ball is in group 3.
7 f1 [1 z7 {2 c; q6 z" j/ B% ~& \5.39.217.76If the results are Unequal & Equal, it means the ball is in group 1.
1 ]: B+ y$ ~$ _$ S5 _tvb now,tvbnow,bttvbIf the results are Unequal & Unequal, it means the ball is in group 2.5.39.217.764 v {6 G" T6 f$ v) f
" r# ~1 i& m" z4 \Once you determine the group that contains the ball.
' @2 q K. q, @4 T2 BSimply weigh two of the balls |
發表於 2007-11-15 03:54 PM
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