原帖由 stupid818 於 2008-4-17 11:42 PM 發表 8 K3 V: N- X3 F; ]
first, compare 6 and another 6. they must have difference. tvb now,tvbnow,bttvb$ A# E4 G( \5 R; g$ Q
second, divide those 6 heavier one into two, each has 3. u will find difference again.5.39.217.76# z& ~& c. X2 i; O' C3 c! H
third time, if u put 2 and they are equal, u will kno ... tvb now,tvbnow,bttvb( X, |; q8 E- B% w6 w" g1 k! w) o6 r
9 ~$ a- m+ n' z0 x3 U) D$ |but the question has not defined whether the abnormal ball is heavier or ligher than normal ones .... |