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The Canadian Mathematical Olympiad (CMO) is Canada's premier national advanced mathematics competition. Candidates require an invitation from the Canadian Mathematical Society in order to participate.

The CMS wishes to thank the sponsors and partners who make our competitions program successful.


The 2020 Canadian Mathematical Olympiad will be held in March. Exact date will be announced here when chosen.

CMO 2020
Official Results:

Thomas Guo
CMO Champion

Congratulations to CMO Champion Thomas Guo who attends Philips Exeter Academy in NH, United States!

Thomas has earned this year's Canadian Mathematical Olympiad Cup and $2,000 cash!

Canadian Division
Place Competitor(s) Prize
1st Thomas Guo, Philips Exeter Academy, NH, United States $ 2000 and the CMO Cup
2nd Zixiang Zhou, London Central Secondary School, London, ON $ 1500 prize
3rd Michael Li, Marc Garneau Collegiate Institute, Toronto, ON $ 1000 prize
(listed alphabetically)
Andrew Dong, Centennial Collegiate and Vocational Institute, Guelph, ON;
Arvin Sahami, Richmond Hill World School, Richmond Hill, ON;
Eric Shen, University of Toronto Schools, Toronto, ON;
Kevin Wan, Marc Garneau Collegiate Institute, Toronto, ON;
Edgar Wang, Marianopolis College, Westmount, QC;
Daniel Yang, University of Toronto Schools, Toronto, ON;
$ 500 each
  • Download and try the 2020 questions.
  • View the official solutions.
  • Read our press release
  • The top score this year was 32/35, the median score was 9/35.
  • A total of 83 students from more than 60 different schools wrote the 2020 CMO.
  • Competitors can look up their own scores by giving their (6- or 7-digit) ID number here:
CJMO 2020

The 2020 Canadian Junior Mathematical Olympiad (CJMO) took place on March 12. The CJMO is an olympiad style competition for younger students: grade 10 and below.

The 2020 CJMO Champion is Richard Zhang of Western Canada H.S., Calgary, AB. Congratulation!

Four other students were recognized with Honourable Mention. They are, in alphabetical order:

  • William Bate (Math Challenge at Western), London, ON;
  • Jason Fang (Prince of Wales Secondary School), Vancouver, BC;
  • George Wang (University of Toronto Schools), Toronto, ON;
  • Haozhe Yang (Walter Murray Collegiate), Saskatoon, SK.

  • Download and try the 2020 questions
  • View the official solutions
  • The top score this year was 21/35, the median score was 10/35.
  • A total of 19 students from 17 different schools wrote the 2020 CJMO.



    Candidates require an invitation from the Canadian Mathematical Society in order to participate:

    1. The Canadian Open Mathematics Challenge (COMC) is the main qualifier for the CMO. Normally, the top 50 qualifying students from the COMC receive a direct invitation to write the CMO.
    2. Approximately the top 15-20 competitors from the CMO Qualifying Repêchage (CMOQR) earn invitations to the CMO.
    3. Normally, the top 3 students from the Alberta High School Mathematics Competition (Part II) and le Concours de l'Association Mathématique du Québec are invited to write the CMO.


    In order to be eligible to write the CMO and receive prizes, the student:

    • must be a Canadian citizen or permanent resident of Canada who is in full-time attendance at an elementary or secondary school, or CEGEP since September of the year prior to the CMO;
    • be less than 20 years old as of June 30 of the year of the CMO; and
    • must not have written the Putnam Competition.

    Students who choose to write the CMO agree to allow the CMS to publish their names and schools when announcing contest results.

    Results and Prizes

    Official results: Actual scores are not displayed publicly but students will be informed of their own scores.

    The Championship title, the Cup and the prize money are only awarded to students who are Canadian citizens or Permanent Residents, regardless of their current location.

    Prizes: If there are no ties, the First Prize winner in the Canadian Mathematical Olympiad receives the CMO Cup and $2000. In addition, the Second Prize winner receives $1500, the Third Prize winner receives $1000 and students earning an Honourable Mention (up to six students) receive $500 each. In the case of ties, prizes are pooled upwards.

    Preparing for the CMO

    It is important to emphasize that any student who is invited to write the CMO should be aware that success will require mathematics at a higher level than is taught in most schools, and therefore should prepare specifically for the competition. The CMS has several resources available for competitors.

    Past Competitions

    The CMO Hall of Fame
    The following pages list the CMO winners from past competitions sorted

    Exam Archive

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