原帖由 stupid818 於 2008-4-17 11:42 PM 發表 
& c# R# k) o, C* n& q4 qfirst, compare 6 and another 6. they must have difference. tvb now,tvbnow,bttvb7 h& h7 r( t6 ^
second, divide those 6 heavier one into two, each has 3. u will find difference again.
" ~+ Z. k+ h! hthird time, if u put 2 and they are equal, u will kno ... tvb now,tvbnow,bttvb4 r$ K. D$ r' q- N- U
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but the question has not defined whether the abnormal ball is heavier or ligher than normal ones .... |