原帖由 stupid818 於 2008-4-17 11:42 PM 發表 
+ f7 i- n- ~! g, m/ Z5.39.217.77first, compare 6 and another 6. they must have difference. tvb now,tvbnow,bttvb' h4 n( _. r7 L( ^5 a1 O7 k* e6 T
second, divide those 6 heavier one into two, each has 3. u will find difference again.
$ w, e, _3 K0 i$ n8 q" u. a' d( n; Dtvb now,tvbnow,bttvbthird time, if u put 2 and they are equal, u will kno ... tvb now,tvbnow,bttvb. U2 q& o# [, J/ t/ r4 J( T c) {
/ Z) k2 a# w! n& I
but the question has not defined whether the abnormal ball is heavier or ligher than normal ones .... |