原帖由 stupid818 於 2008-4-17 11:42 PM 發表 公仔箱論壇/ U' ^% | d& E
first, compare 6 and another 6. they must have difference.
& l; ?' H% H0 w- A8 c, Z- ?7 ksecond, divide those 6 heavier one into two, each has 3. u will find difference again.5.39.217.77- Y8 _/ \8 a/ v- K! a0 j' l8 e
third time, if u put 2 and they are equal, u will kno ... tvb now,tvbnow,bttvb( ]% Q N. J* {9 W& o9 P
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but the question has not defined whether the abnormal ball is heavier or ligher than normal ones .... |