原帖由 stupid818 於 2008-4-17 11:42 PM 發表 
; y2 n. ?' B# d) w$ [7 J! n$ gtvb now,tvbnow,bttvbfirst, compare 6 and another 6. they must have difference. : Y' g3 A- X& Z; m1 c
second, divide those 6 heavier one into two, each has 3. u will find difference again.) I4 K7 n; a+ C; F
third time, if u put 2 and they are equal, u will kno ... 5.39.217.77:8898/ S8 @$ k6 E, r5 X' d$ I! j, R+ p
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but the question has not defined whether the abnormal ball is heavier or ligher than normal ones .... |