1973 IMO Problems/Problem 2

Revision as of 22:37, 18 July 2016 by 1=2 (talk | contribs)

Determine whether or not there exists a finite set M of points in space not lying in the same plane such that, for any two points A and B of M; one can select two other points C and D of M so that lines AB and CD are parallel and not coincident. This problem needs a solution. If you have a solution for it, please help us out by adding it.