2025 Canadian Mathematical Olympiad and Junior Olympiad Results Released

 

Ottawa, ON – The Canadian Mathematical Society (CMS) is pleased to announce the results of the 57th Canadian Mathematical Olympiad (CMO), Canada’s premier competition in advanced mathematics. This year’s competition took place on March 6, with 95 students rising to the challenge. 

The CMO is an elite, invitation-only event. All official participants are Canadian citizens or Permanent Residents of Canada. Invitations were extended based on student performance in the Canadian Open Mathematics Challenge (COMC) held in October 2024, and the CMO-Qualifying Repêchage (CMOQR) held in February 2025.

Reflecting on this year’s competition, CMO Committee Chair Dr. Pawel Pralat (Toronto Metropolitan University) shared the following remarks:

“The Canadian Mathematical Olympiad and Junior Olympiad (CMO/CJMO) continue to serve as invaluable arenas for showcasing the remarkable talents of our young minds. Similarly to the previous years, we witnessed the extraordinary achievements and exceptional problem-solving skills of our participants. In fact, unintentionally, one of the problems was more difficult than originally intended, creating additional challenges for the students. Congratulations to all participants!”

2025 CMO Champion
Warren Bei  has been named the 2025 CMO Champion. Warren is a grade 12 student at Rockridge Secondary in West Vancouver, BC. His stellar performance earns him a cash prize and a place of honour on the CMO Championship Cup, a full-sized trophy displayed annually at the champion’s school.  This is Warren’s fourth time winning the CMO championship!

The CMS also congratulates the following prize-winners for their achievements:

Silver Medalist:
• Ming Yang (Grade 12 – Brophy College Preparatory, Phoenix, AZ, USA)

Bronze Medalist:
• Ansh Agarwal (Grade 11 – Marc Garneau Collegiate Institute, Toronto, ON)

Honourable Mentions:
• Ryan Bai (Canyon Crest Academy, San Diego, CA, USA)
• Perry Dai (University of Toronto Schools, Toronto, ON)
• Raymond Ouyang (William Lyon Mackenzie Collegiate Institute, North York, ON)
• Zhekai Shen (Elite Preparatory Academy, Hopatcong, NJ, USA)
• Hedong Wang (Pinetree Secondary School, Coquitlam, BC)
• Gee Yun Yiu (No.2 High School Of Eastern China Normal University/ZIZHU, Shanghai, China)

The top score in the 2025 CMO was 27/35, while the median score stood at 8/35.

All prize recipients will receive cash awards, with amounts determined by performance level. 

The CMS is grateful to its donors, sponsors and partners for making the CMO and these prizes possible.

Matthew Brennan Prize for Best Solution
The Matthew Brennan Prize honours the memory of IMO team leader and former Olympian Matthew Brennan. In collaboration with his family, the CMS awards this $500 prize to the author of the most elegant solution in the CMO.

The Matthew Brennan Award goes to Warren Bei for his solution to Problem 3. This was a difficult problem, with most correct solutions being somewhat technical. Warren’s solution was notable in that it was very short and clean. Congratulations to Warren!

2025 Canadian Junior Mathematical Olympiad (CJMO)

The CMS also hosted the 6th Canadian Junior Mathematical Olympiad (CJMO) on March 6th, 2025, aimed at younger students aspiring to future CMO participation. Close to 20 students participated in this junior-level competition.

CJMO Coordinator Dr. James Rickards (Saint Mary’s University) shared his thoughts on the competition:

“This year’s CJMO was more difficult than usual. Despite this, the students performed admirably! We look forward to seeing their names on the CMO in the upcoming years.”

2025 CJMO Winner
Warren Maximilian Lin has been named the 2025 CJMO Champion. Warren is a Grade 9 student at Toronto STEM School and Leading Aces Academy, in Toronto, Ontario. Congratulations to Warren for this accomplishment!

The CMS also congratulates the following CJMO winners for their achievements:

Silver Medalist:
• Nanxuan Zhang (Secondary 4 – École Internationale Lucille-Teasdale, Brossard, QC)

Bronze Medalist:
• Stephen Cui (Grade 7 – Odle Middle School, Bellevue, WA, USA)

The top CJMO score was 23/35, and the median score was 9/35.

All CJMO prize winners will receive cash awards, with funding made possible by CMS donors and sponsors.

Congratulations to all CMO and CJMO winners and participants for their outstanding achievements!

For full results, problems, and solutions for the 2025 CMO and CJMO, please click here. 

About the Canadian Mathematical Olympiad and the Junior Olympiad
The Canadian Mathematical Olympiad (CMO) is Canada’s premier national advanced mathematics competition. Candidates require an invitation from the Canadian Mathematical Society to participate. The competition consists of five highly challenging questions requiring fully justified written solutions. The results of the CMO factor strongly in CMS’ selection process for the Canadian teams’ participation at international Olympiads.  Winning competitors from previous years are listed here.

The Canadian Junior Mathematical Olympiad (CJMO) is an advanced mathematics competition created for students up to grade 10. It is invitational and takes place at the same time as the CMO. The CJMO consists of five challenging questions designed for students up to grade 10. Each question requires a fully-justified written solution.

About the Matthew Brennan Prize for Best Solution
The Matthew Brennan Prize for Best Solution honours International Mathematical Olympiad (IMO) leader and former Olympian, Matthew Brennan, whose life was lost unexpectedly and before his time. The prize was created by the CMS in partnership with Matthew’s parents and awards 500 dollars to the participant with the best solution in the CMO.

Matt was born in Toronto and attended Upper Canada College from Grades one through twelve. In 2012, he started at MIT, where he obtained a Bachelor of Science in Electrical Engineering and Computer Science and in Mathematics in 2016, and a Master of Science in Electrical Engineering and Computer Science in 2018. His Master’s thesis, entitled “Reducibility and Computational Lower Bounds for Problems with Planted Sparse Structure”, was awarded the Ernst A. Guillemin Award for Best Thesis in Electrical Engineering. At the time of his death, Matt was in the final year of his Ph.D. in Electrical Engineering and Computer Science at MIT and had been awarded a Miller Fellowship at UC Berkeley starting in the fall of 2021. Matt’s main research interests were the theoretical aspects of machine learning and probability theory.

Matt represented Canada twice at the International Mathematical Olympiad, earning a bronze medal in 2011 and a gold medal in 2012. He returned to the IMO as deputy leader observer in 2014 and 2017, and was the leader in 2019. Matt was passionate about Olympiad math, and had served on the Canadian Mathematical Olympiad committee since 2014. He also contributed extensively to problem creation and selection. In addition to having had two problems included on the IMO shortlist, in any average year three of the five CMO problems were proposed by Matt. His dream in life was that after a long academic career, he would do contest problems all day as a professor emeritus.

When Matt was not doing research or Olympiad problems, he was likely playing basketball. In addition to spending hours and hours practicing and playing pick-up, he played on three different intramural teams. Even at the IMO training camps, he was constantly itching to play.

About the Canadian Mathematical Society (CMS)
The Canadian Mathematical Society (CMS) is the main national organization whose goal is to promote and advance the discovery, learning and application of mathematics. The Society’s activities cover the whole spectrum of mathematics including meetings, research publications, and the promotion of excellence in mathematics competitions that recognize outstanding student achievements. The CMS is a registered non-profit, charitable organization and depends on grants, funding, and generous donations from sponsors, benefactors and community members to be able to carry out its activities.

For more information, please contact:

Dr. Pawel Pralat (Toronto Metropolitan University) Chair, CMO Committee Canadian Mathematical Society chair-cmoc@cms.math.ca

Dr. James Rickards (Saint Mary’s University) Chair, IMO Committee Canadian Mathematical Society chair-imoc@cms.math.ca