Math Day at The Beach 2025
On October 11, 2025, the 24th Math Day at The Beach event was hosted on the California State University, Long Beach campus. Math Day at The Beach is a problem-solving festival for Southern California high school students who want to have fun with mathematics and enjoy a day of camaraderie with university mathematics students and professors.
A total of 34 teams of six high school students each participated in this event, 6 teams in Division A and the others in Division B.
This year's event was hosted on the campus and it was an unequivocal success. There were several parts to this event: an individual round, team round, relay, presentation by an invited speaker, teachers face-off round, and the face-off round to determine individual winners. The problems were designed by the Mathematics and Statistics Department faculty and were selected from algebra, geometry, trigonometry, number theory, combinatorics, and probability.
2025 Winners
Here is a list of the teams and individuals who placed during the competition.
Winning Teams in Division A:
- 1st place – University High School, Team #1
- 2nd place – Palos Verdes Peninsula High School
- 3rd place – Sierra Canyon School
Winning Teams in Division B:
- 1st place – Portola High School
- 2nd place – Beckman High School, Team #1
- 3rd place – Great Oak High School, Team #1
- 4th place – Sage Hill School
- 5th place – TVT Community Day School
Individual Winners:
- 1st place – Max Sachelarie, Portola High School
- 2nd place – Feodor Yevtushenko, University High School
- 3rd place – Patrick Liang, North Hollywood High School
- 4th place – Aaron Luo, Palos Verdes Peninsula High School
- 5th place – Evan Li, San Marino High School
Top Three New Teams:
- Arcadia High School
- San Dimas High School
- Sunny Hills High School, Team #1
Relay Round Sole Winning Squad:
Reece Liu, Evan Li, and Max Zhou, San Marino High School
Tiebreaker Winner:
Atticus Stewart, Geffen Academy
Invitation to 2026
An invitation to participate in the 2026 event will go out to schools in April of 2026. If your school is interested in trying its hand at tackling those math problems, email Dr. Olga Korosteleva at Olga.Korosteleva@csulb.edu to request practice tests.
Schools that could compete in Division A next year (if they prefer):
- North Hollywood High School
- Palos Verdes Peninsula High School
- Portola High School
- San Marino High School
- Sierra Canyon School
- University High School
About Math Day at The Beach
This annual event was started in 2000 by the Department of Mathematics and Statistics under the directorship of Dr. Kent Merryfield, a charismatic leader with unparalleled expertise in high-school math competitions, and ran uninterrupted until Dr. Merryfield's untimely death in November of 2018.
In March 2019, the 20th Math Day at The Beach took place under the new directorship of Dr. Olga Korosteleva. Then the pandemic placed this event on hold for two years. The event returned on March 12, 2022, and has been held since.
Math Day at The Beach is completely free, thanks to our generous sponsors, the Jerry Cassaday Family and LBS Financial Credit Union.
