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Rex Chu
New Zealand representative at IMO 2025 (Bronze Medal); student at Auckland Grammar School
Auckland Grammar School · 
Auckland, New Zealand · academic
Auckland, New Zealand · academicRex Chu is a New Zealand mathematics olympiad student at Auckland Grammar School. He was a member of New Zealand's six-person team at the 2025 International Mathematical Olympiad (Sunshine Coast, Australia), where he won a Bronze Medal with 19 points, placing 303rd overall (52.1%). Earlier in 2025 he represented New Zealand at the Asian Pacific Mathematics Olympiad (APMO), scoring 9, and in 2024 he earned an Honourable Mention at the New Zealand Mathematical Olympiad (AMO).
Details
LocationAuckland, New Zealand
MathematicsCompetitive mathematics / mathematical olympiadChess
Notes
- Represented New Zealand at IMO 2025 in Sunshine Coast, Australia, earning a Bronze Medal with 19 points (rank 303, 52.1%).Jul 2025
- Was on the actual NZ IMO 2025 results team (Haotian Wang, Jay Zhao, Ray Shi, Edward Xiao, Rex Chu, Alston Yam), which differs from the six names in the April 2025 pre-competition team announcement - indicating a late team change before the contest.Jul 2025
- Scored 9 (P1=4, P2=5) at APMO 2025, placing 5th among NZ contestants - a showing just below the Honourable Mention threshold.2025
- Attends Auckland Grammar School (same school as IMO 2025 teammates Haotian Wang and Yu-Jui Chu).2025
- Earned Honourable Mention at the NZ Mathematical Olympiad (AMO) 2024 as an Auckland Grammar School entrant.2024
Experience
Student at Auckland Grammar School
Education
Auckland Grammar School
AchievementsBronze Medal, International Mathematical Olympiad 2025 (New Zealand; 19 points, rank 303, 52.1%) · 5th-highest New Zealand scorer, Asian Pacific Mathematics Olympiad (APMO) 2025 (9 points) · Honourable Mention, New Zealand Mathematical Olympiad (AMO) 2024
AwardsIMO 2025 Bronze Medal · NZ AMO 2024 Honourable Mention
Competition record
New Zealand · IMO