The 2021 Canadian Open Mathematics Challenge — Oct 28/29


The Canadian Open Mathematics Challenge (COMC) is Canada's premier national mathematics competition open to any student with an interest in and grasp of high school math. The purpose of the COMC is to encourage students to explore, discover, and learn more about mathematics and problem solving. The competition serves to provide teachers with a unique student enrichment activity during the fall term.

Approximately 80 top-ranking students from the COMC and the Canadian Mathematical Olympiad Qualifying Repêchage (CMOQR) will be invited to write the Canadian Mathematical Olympiad (CMO). Based on the results from the COMC, the CMO and other national and international mathematics competitions and camps, the Canadian Mathematical Society IMO Committee will then select six students as part of Math Team Canada to travel to, and compete in, the International Mathematical Olympiad (IMO).

Top COMC female contestants will also qualify to be part of Girls’ Math Team Canada to represent Canada at the European Girls' Mathematical Olympiad (EGMO). EGMO is an international mathematics competition.

Depending on their grade level and performance, students participating in the COMC will also have the opportunity to be considered for university scholarships, get invited to math camps, garner awards, and win prizes.

Thank you for participating in the 2021 COMC!

The 2021 exam paper (PDF) is available for download.

The unofficial solutions (PDF) are now available for download. In January, we will publish the "official solutions".


The exams are currently being marked and verified. Teachers will be notified by email once the preliminary scores become available. Scores will be posted to your COMC online account.

An e-mail will be sent out to teachers in early December asking for confirmation of spellings (including punctuation and capitalization) of school and student information, so that any issued awards, certificates and plaques will be correct.

We anticipate preliminary scores will be available to teachers in late December, before students leave for the holidays. Final scores, award winners, and prize draw recipients will be announced publicly in early January.

Teachers can log in to their school accounts at any time.

Stay informed!

Subscribe to the free Canada Math Competitions e-mail list.

Provides announcements and information from the CMS related to the COMC, CMO, IMO, and other student math competitions.

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