原帖由 stupid818 於 2008-4-17 11:42 PM 發表 
( ]% v2 O6 w# d0 F8 } m1 gfirst, compare 6 and another 6. they must have difference. 公仔箱論壇: M) Q$ y% b4 O$ R- Y0 \) S1 ^2 l
second, divide those 6 heavier one into two, each has 3. u will find difference again.5.39.217.77$ f; @0 b7 ~6 Y! X) T9 e6 a1 w+ Z
third time, if u put 2 and they are equal, u will kno ... 8 l* }: B9 I, }$ L0 L' F, w2 p5.39.217.77
! p3 y5 H0 Z! ], I& T+ A* [. P5.39.217.77but the question has not defined whether the abnormal ball is heavier or ligher than normal ones .... |