原帖由 stupid818 於 2008-4-17 11:42 PM 發表 
# k. }- _: m' B3 p- Lfirst, compare 6 and another 6. they must have difference. 公仔箱論壇) M8 P) {& B# C5 p
second, divide those 6 heavier one into two, each has 3. u will find difference again.公仔箱論壇3 A* B% _4 [+ d3 t: L
third time, if u put 2 and they are equal, u will kno ... 公仔箱論壇, y+ \0 X+ o0 p7 [
7 Q2 T$ D& j+ F7 q; Z: m
but the question has not defined whether the abnormal ball is heavier or ligher than normal ones .... |