原帖由 stupid818 於 2008-4-17 11:42 PM 發表 
$ k+ Q) y1 l, H0 O; j2 Cfirst, compare 6 and another 6. they must have difference.
( _& Y- Y, X5 [2 s# Q2 Osecond, divide those 6 heavier one into two, each has 3. u will find difference again.TVBNOW 含有熱門話題,最新最快電視,軟體,遊戲,電影,動漫及日常生活及興趣交流等資訊。5 o: t7 E. Y9 H& j' y3 C% q$ Z* H$ r& f
third time, if u put 2 and they are equal, u will kno ... 5 E5 h3 q" Q6 D7 |: Q
( |' ^' g' s M$ g( S5 {% r5 lbut the question has not defined whether the abnormal ball is heavier or ligher than normal ones .... |