NMOS
Singapore's premier primary school math competition for Primary 5 students, organized by NUS High School and the Singapore Mathematical Society.
Grade Levels
Grades 5-5 (Ages 10-11)
Format
Short Answer · 35 questions · Approximately 2 hours
Scoring
35 questions, single round. Scored on correct answers. Top 20 schools receive trophies.
July
Competition day (July, varies annually)
Registration
Through schools only — no individual registration
Prizes & Recognition
Gold, Silver, Bronze, and Honourable Mention certificates. Top 20 schools receive trophies. Valuable for NUS High School Direct School Admission (DSA) portfolio.
About This Competition
The National Mathematical Olympiad of Singapore (NMOS) is a prestigious mathematics competition organized by NUS High School of Mathematics and Science in collaboration with the Singapore Mathematical Society. Since 2024, it has been exclusively focused on Primary 5 students.
The competition consists of 35 questions in a single round format, testing mathematical problem-solving skills beyond the standard curriculum. Despite 'Olympiad' in the name, NMOS is designed to be accessible to motivated primary school students, not just competition veterans.
NMOS holds particular significance in Singapore's education landscape because strong performance is valuable for NUS High School's Direct School Admission (DSA) process. The top 20 participating schools receive trophies, creating friendly inter-school competition. Individual awards include Gold, Silver, Bronze, and Honourable Mention certificates.
Registration is exclusively through schools — individual entries are not accepted. This ensures proper supervision and makes NMOS a school-supported activity rather than a private endeavor.
How to Prepare
Master the Singapore Math Problem-Solving Methods
NMOS heavily tests Singapore Math heuristics: model drawing, systematic listing, working backwards, and guess-and-check. Master these specific techniques.
Speed Is Critical — Two Hours, 30 Problems
With 30 short-answer problems in about 2 hours, you need to work quickly. Practice solving problems in under 4 minutes each and managing your time across the paper.
Use NUS High's NMOS Past Papers
NUS High School of Mathematics and Science organizes NMOS and provides past year papers. Also use 'Challenging Word Problems' book series for Singapore Math preparation.
Showcase Your Talent for NUS High Admission
Strong NMOS performance is recognized by NUS High School during their admissions process. This competition is a chance to demonstrate your mathematical potential.
Frequently Asked Questions
What is NMOS?
NMOS (National Mathematical Olympiad of Singapore) is organized by NUS High School of Mathematics and Science in collaboration with the Singapore Mathematical Society. Since 2024, it is exclusively for Primary 5 students, making it a focused single-grade competition.
Why is NMOS limited to Primary 5?
NMOS was restructured in 2024 to focus exclusively on Primary 5 students. This change was designed to create a more equitable competition for students at the same stage of their mathematical development, rather than having younger students compete against older ones.
How does NMOS help with school admissions?
Strong performance in NMOS is valuable for NUS High School's Direct School Admission (DSA) process. NUS High is Singapore's specialized school for mathematics and science, and NMOS results are one of the key indicators they consider.
Can individual students register?
No. NMOS only accepts registration through schools. Students must ask their school's mathematics department to register a team. Each school can send multiple participants.
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