原帖由 stupid818 於 2008-4-17 11:42 PM 發表 
: d7 o" m0 @5 jfirst, compare 6 and another 6. they must have difference. ' Y6 T) W& R3 x* Y, o
second, divide those 6 heavier one into two, each has 3. u will find difference again.公仔箱論壇( a: m. Y ?* J3 D1 N; g
third time, if u put 2 and they are equal, u will kno ... ' y3 W3 [4 x+ G, h' Qtvb now,tvbnow,bttvb
/ O2 c, D1 ?% |( N6 e9 s1 \tvb now,tvbnow,bttvbbut the question has not defined whether the abnormal ball is heavier or ligher than normal ones .... |