The 25th Nordic Mathematical Contest was held on 4 April 2011
hosted by Denmark. At most 20 contestants from each Nordic country
were elected by the national secondary school mathematical olympiad
organisations:
Four problems were to be solved within four hours. Each contestant
normally wrote the exam in her or his own school; in some countries
the contest was arranged otherwise. The host issued the exam paper and
decided the final ranking based on a preliminary marking within the
individual countries. The scores may range from 0 to 20 points with a
complete solution of one problem giving 5 points. A diploma of
participation has been issued to every participant.