Divide the 12 balls into 4 groups of 3's.
5 [5 v% n& J% o) l( ]5.39.217.76Weigh group 1 & 2tvb now,tvbnow,bttvb+ u9 d5 V, z' ^: w7 q* t$ o5 c
then weigh group 2 & 32 U! s# h- [- h* l$ i1 R) I/ u5 o
If the results are Equal & Equal, it means the ball with the different weight is in group 4.9 e/ J }! W8 H5 l
If the results are Equal & Unequal, it means the ball is in group 3.
, G9 Y1 y) P0 O: w; E0 U& @. A8 }5.39.217.76If the results are Unequal & Equal, it means the ball is in group 1.
; \. T& R7 ~, q0 jIf the results are Unequal & Unequal, it means the ball is in group 2.
$ j" S" D# w! {5 H3 D5.39.217.76公仔箱論壇! r$ l' ]* ]0 A3 B" r0 f+ q
Once you determine the group that contains the ball.
. p0 ?& ?. y$ f, s: NSimply weigh two of the balls |
發表於 2007-11-15 03:54 PM
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