原帖由 stupid818 於 2008-4-17 11:42 PM 發表 
! l) p% j6 v; ]公仔箱論壇first, compare 6 and another 6. they must have difference. tvb now,tvbnow,bttvb! q: l. L0 F& a# k2 x& \- |
second, divide those 6 heavier one into two, each has 3. u will find difference again.
% l, I! u7 |; S5 ^ Lthird time, if u put 2 and they are equal, u will kno ... . X$ \! i; l* _. w6 f# a, m0 n: ptvb now,tvbnow,bttvb- s2 | f$ Q0 I- G9 t
but the question has not defined whether the abnormal ball is heavier or ligher than normal ones .... |