原帖由 stupid818 於 2008-4-17 11:42 PM 發表 
% I6 w$ i7 t2 O7 X5.39.217.77:8898first, compare 6 and another 6. they must have difference. 0 W1 j; X# n( D, V# t0 ]
second, divide those 6 heavier one into two, each has 3. u will find difference again.5.39.217.77:8898! g8 b+ G1 x9 f9 U
third time, if u put 2 and they are equal, u will kno ... 9 _* M1 k, z* L3 V7 ?6 B: z% _5.39.217.77:88985.39.217.77:8898" B7 V' W+ M; ?9 u! z
but the question has not defined whether the abnormal ball is heavier or ligher than normal ones .... |