For the 2013-2014 OMO contests, we will be moving to a new website: http://www.internetolympiad.org/omo. Please update your bookmarks!


Thank you for participating in the 2013 Winter OMO Contest! We hope you all enjoyed the test as much as we enjoyed running it. Best of luck on the rest of your 2013 competitions! Answers and solutions have been posted here; results and problem statistics have been posted here. If you have a few minutes to spare, please log in and fill out the feedback form so we can make helpful changes in the future. Also, let us know which problems you enjoyed the most! For now, we encourage all of you to join the contest discussion at AoPS.

The Online Math Open (OMO) hosts a series of free team-based math competitions, each lasting approximately 1-2 weeks. Problem difficulty ranges from early AMC- to late IMO-level, and we welcome pre-collegiate students from any country. For more information, see the contest info page.

119 teams participated in the 2012-2013 Winter Contest, which ran from Friday, January 4, 2013 to Tuesday, January 15, 2013. The problems can be found here.

141 teams participated in the 2012-2013 Fall Contest, which ran from Monday, September 24, 2012 to Monday, October 1, 2012. The problems can be found here.

94 teams participated in the 2011-2012 Winter Contest, which ran from Monday, January 16, 2012 to Monday, January 23, 2012. The problems can be found here.

If you have any questions or suggestions, feel free to email us at OnlineMathOpenTeam@gmail.com. You must be logged in to view this page