原帖由 stupid818 於 2008-4-17 11:42 PM 發表 
4 _4 W6 R! D4 Y, o" @公仔箱論壇first, compare 6 and another 6. they must have difference. 公仔箱論壇6 r. x! s- P/ l* R" Y7 A! ?
second, divide those 6 heavier one into two, each has 3. u will find difference again.公仔箱論壇! ?+ t, V6 Y- b/ e; ^
third time, if u put 2 and they are equal, u will kno ... tvb now,tvbnow,bttvb& A ]( q' u9 \
7 k R9 h% d' d% p5 B
but the question has not defined whether the abnormal ball is heavier or ligher than normal ones .... |