banner image



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. It is the most prestigious math competition in Canada, and one of the most prestigious in the Americas. The COMC is the only way to be invited to the CMS’ free, exclusive training camps and compete internationally as part of Math Team Canada!

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.

CMO Qualifier: The results of the COMC matter!  Approximately 100 – 120 top-ranking students from the COMC are invited to write the Canadian Mathematical Olympiad (CMO) or the Junior CMO (CJMO) in March.  The CMO, in turn, is a qualifier for Team Canada at the International Mathematical Olympiad (IMO) held in a different city each July.

EGMO Qualifier: The top 6 – 8 COMC female contestants will also qualify for selection to represent Canada at the European Girls’ Mathematical Olympiad (EGMO). EGMO is an international mathematics competition held each April in a European host city each year.

APMO Qualifier: Approximately 10 – 20 top-ranking students from the COMC are also selected to write the Asia-Pacific Mathematical Olympiad (APMO) as Team Canada.

See our

diagram for the big picture on how our competitions tie together.


This year’s COMC competition will take place on Wednesday, October 30th in Canada and the Americas (anywhere in North/South American time zones), and on Thursday, October 31st elsewhere in the world.

exclamation pointNOTE:  Because of Halloween this year, we are scheduling COMC for Wednesday instead of Thursday in the Americas.

World Wednesday Thursday En


Normally, all registration is done by teachers or school staff using their Portal accounts.

Schools or Organizations: Registration will open on this page on September 3rd. 

Last day for registration is Thursday, October 24th (or October 16th for shipped exams).

Rates and Delivery Methods

Schools can order exams to be pre-printed by the CMS and shipped to them by courier (“Shipped by Courier”) or can receive the exams as PDF files which are uploaded directly to the Competitions Portal (“PDF Delivery”) that their proctor/teacher can download and print locally prior to the competition. Due to the shipping, printing and handling costs, the PDF option is less expensive.

Shipped by Courier (deadline: Oct 16) PDF Delivery (deadline: Oct 24)
School Location Cost/exam Minimum order size Cost/exam Minimum order size
Canada $35.00 CAD 5 $30.00 CAD 3
Outside Canada $40.00 USD 10 $35.00 USD 5

Payments and Cancellations: All payments are due by Oct 24th (Oct 16th for shipped exams).  We reserve the right to cancel unpaid orders.  Teachers can cancel their orders until these dates, however we will retain a 10% fee.

Paper Exams

All students – with rare, authorized exception – will write the COMC on paper in the physical presence of a qualified proctor, typically a teacher at their school.


Please see our FAQ page.