原帖由 stupid818 於 2008-4-17 11:42 PM 發表 
+ J& r$ R/ n% _first, compare 6 and another 6. they must have difference.
I6 z9 w" V7 G6 U) X; Psecond, divide those 6 heavier one into two, each has 3. u will find difference again.
* n8 f' Y3 n0 b) N& I* L3 Utvb now,tvbnow,bttvbthird time, if u put 2 and they are equal, u will kno ... 4 H6 q( y, B- A
tvb now,tvbnow,bttvb( b! A( a# E1 ]
but the question has not defined whether the abnormal ball is heavier or ligher than normal ones .... |