原帖由 stupid818 於 2008-4-17 11:42 PM 發表 
: R0 T# F( F" N! } D4 K! utvb now,tvbnow,bttvbfirst, compare 6 and another 6. they must have difference. 公仔箱論壇. m' x, a4 n" y) A3 p) p' ]
second, divide those 6 heavier one into two, each has 3. u will find difference again. o! U9 L' K8 n% ~& k6 v
third time, if u put 2 and they are equal, u will kno ... " f. H* s7 n6 y% w0 W# U
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but the question has not defined whether the abnormal ball is heavier or ligher than normal ones .... |