原帖由 stupid818 於 2008-4-17 11:42 PM 發表 
7 g) q8 n, A+ _" E" [. k2 b9 g! efirst, compare 6 and another 6. they must have difference. $ T" Z, }- c- f& ?% P' c
second, divide those 6 heavier one into two, each has 3. u will find difference again.tvb now,tvbnow,bttvb1 C" t1 g8 }2 C) a
third time, if u put 2 and they are equal, u will kno ... 9 x$ b5 ?; e# t, F! e7 S$ w/ e
4 ]+ M% d1 j4 }# \tvb now,tvbnow,bttvbbut the question has not defined whether the abnormal ball is heavier or ligher than normal ones .... |