原帖由 stupid818 於 2008-4-17 11:42 PM 發表 
~3 S# i, ]; _ p% m1 m' v5 q5.39.217.77:8898first, compare 6 and another 6. they must have difference.
9 }9 }. ?1 @0 h5.39.217.77:8898second, divide those 6 heavier one into two, each has 3. u will find difference again.tvb now,tvbnow,bttvb5 R' y1 J, u, i; s
third time, if u put 2 and they are equal, u will kno ... - O- J- t' M3 W' \公仔箱論壇- [; i7 v' K9 R4 l8 P; L
but the question has not defined whether the abnormal ball is heavier or ligher than normal ones .... |