stupid818

first, compare 6 and another 6. they must have difference. : k2 [9 ?  u& m* R0 q
second, divide those 6 heavier one into two, each has 3. u will find difference again.
! I0 Z7 f1 ?4 @" ^. j, Btvb now,tvbnow,bttvbthird time, if u put 2 and they are equal, u will know the different one.
% I) X$ m! z- U; q4 {公仔箱論壇so easy....