原帖由 stupid818 於 2008-4-17 11:42 PM 發表 
: S! e5 _) e" K! Y+ V1 Q* ofirst, compare 6 and another 6. they must have difference. 6 Y0 \" z& }: n# d9 V, O3 D
second, divide those 6 heavier one into two, each has 3. u will find difference again.tvb now,tvbnow,bttvb. W3 B) }2 m7 d( L1 ?5 I
third time, if u put 2 and they are equal, u will kno ... $ t s$ I3 Q2 G6 X: n7 S: A4 h, I: W
公仔箱論壇# T, ?3 m, F# |3 O, c
but the question has not defined whether the abnormal ball is heavier or ligher than normal ones .... |