Problem K. 496. (February 2016)
K. 496. Seven friends decided to form clubs. Each club is to have three members, and any two clubs may have at most one member in common. Can they form seven clubs?
Deadline expired on 10 March 2016.
|95 students sent a solution.|
|6 points:||64 students.|
|0 point:||30 students.|
|Unfair, not evaluated:||1 solution.|