
CMO 2023 Champion: Warren Bei
Congratulations to Warren Bei who attends Rockridge Secondary School in West Vancouver, BC!
Warren has earned this year’s CMO Cup and the top prize of $2,000 cash!
Rank | Name | School |
---|---|---|
Gold Medal | Warren Bei | Rockridge Secondary (West Vancouver, BC) |
Silver Medal | Andrew Wen | Phillips Academy (Andover, MA, USA) |
Bronze Medal | Marvin Mao | Bergen Country Academies (Hackensack, NJ, USA) |
Honourable Mention | Emily Ma | Marc Garneau Collegiate Institute (Toronto, ON) |
Joshua Wang | Brookfield Central High School (Brookfield, WI, USA) | |
Kaixin Wang | Magee Secondary School (Vancouver, BC) | |
Ming Yang | Brophy College Preparatory (Phoenix, AZ, USA) |
All official competitors live in Canada or are Canadian Citizens or Permanent Residents living abroad.
Statistics
- Top score: 29/35
- Lowest score for the top quartile: 14/35
- Median score: 9/35
- Competitors: 89 (77 official, 12 unofficial)
Matthew Brennan Award for Best CMO Solution
[read here for general information about the award]
The Award this year goes to Ming Yang of Brophy College Preparatory (Phoenix, AZ, USA) for his solution to problem 3.
The question asked students to prove a geometric inequality, and Ming Yang recasted the claim as a three variable inequality where the variables were shown to sum to 1 by a slick argument involving areas. The solution was finished with a direct application of Jensen’s inequality. The entire solution was just over half a page, and very elegant!

CJMO 2023 Champion: Perry Dai
Congratulations to Perry Dai who attends University of Toronto Schools in Toronto, Ontario!
Rank | Name | School |
---|---|---|
Gold Medal | Perry Dai | University of Toronto Schools (Toronto, ON) |
Silver Medal | Raymond Ouyang | William Lyon Mackenzie Collegiate Institute (North York, ON) |
Honourable Mention | Amos Zhang | University of Toronto Schools (Toronto, ON) |
David Zhang | York Mills Collegiate Institute (Toronto, ON) |
All official competitors live in Canada or are Canadian Citizens or Permanent Residents living abroad.
Statistics
- Top score: 24/35
- Lowest score for the top quartile: 19/35
- Median score: 15/35
- Competitors: 17