原帖由 stupid818 於 2008-4-17 11:42 PM 發表 
7 j, d4 A2 q0 H- f, j, D: _first, compare 6 and another 6. they must have difference. . e2 M* L5 K; ?" O. X2 c( X5 f) v
second, divide those 6 heavier one into two, each has 3. u will find difference again.tvboxnow.com5 [: i, L& Y2 d
third time, if u put 2 and they are equal, u will kno ... 2 r% Q, c z* z公仔箱論壇
5 B1 w# V% N. k2 h, b& \tvboxnow.combut the question has not defined whether the abnormal ball is heavier or ligher than normal ones .... |