原帖由 stupid818 於 2008-4-17 11:42 PM 發表 
9 X3 ~" D8 F; Y; k' k ^tvb now,tvbnow,bttvbfirst, compare 6 and another 6. they must have difference.
& _# n" w7 @. b1 Dsecond, divide those 6 heavier one into two, each has 3. u will find difference again.7 x3 u* B) a1 A3 u2 K
third time, if u put 2 and they are equal, u will kno ... tvb now,tvbnow,bttvb3 s# u& `+ a: c F
公仔箱論壇: y$ M; F) ?9 G. v
but the question has not defined whether the abnormal ball is heavier or ligher than normal ones .... |