原帖由 stupid818 於 2008-4-17 11:42 PM 發表 1 [& u' ]7 n/ i0 o8 u, O6 Y0 a
first, compare 6 and another 6. they must have difference. 8 M$ ~ }+ U ?3 g' o
second, divide those 6 heavier one into two, each has 3. u will find difference again.
2 m' D' q& L' c2 J" otvb now,tvbnow,bttvbthird time, if u put 2 and they are equal, u will kno ... 8 D- W. c2 C9 [( d% P7 @! N
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but the question has not defined whether the abnormal ball is heavier or ligher than normal ones .... |