kfflee

原帖由 stupid818 於 2008-4-17 11:42 PM 發表 5.39.217.77:8898' C5 y6 H9 r% o% W! j  n
first, compare 6 and another 6. they must have difference.
. G" q0 E9 j3 V/ P9 Ysecond, divide those 6 heavier one into two, each has 3. u will find difference again.1 J+ [/ a+ W0 n( L9 z
third time, if u put 2 and they are equal, u will kno ...

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but the question has not defined whether the abnormal ball is heavier or ligher than normal ones ....

kfflee

終於想通了 , 但跟樓主答案不一樣的方法( m- \0 S' E9 m! P9 C2 J
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用了... 大約兩三小時公仔箱論壇0 V% N! b( ~/ L5 n- S% w# z

) T4 [/ C2 U  \& N[ 本帖最後由 kfflee 於 2008-4-21 02:15 PM 編輯 ]