National Mathematical Olympiad of Singapore (NMOS): 2026 Parent & Student Guide

Q: What does National Mathematical Olympiad of Singapore (NMOS): 2026 Parent & Student Guide cover?
A: A source-first summary of what NMOS is, what the official pages say about eligibility and rules, and how to plan practice.

TL;DR
NUS High’s official NMOS pages state that the competition is open to Primary 5 students only and that registration is via schools (no individual registration).
The rules page also states that calculators are not allowed, and publishes year-specific details such as registration windows, fees, and paper format.
As of 2026-01-26, the public rules page is still showing NMO∑ 2025 details—check the official pages again when NMOS 2026 information is published.

1 | What NMOS is (official description)

NUS High’s introduction page describes the National Mathematical Olympiad of Singapore (NMO∑) as an NUS High School initiative working in partnership with the Singapore Mathematical Society. It also lists aims such as generating interest in Mathematics, cultivating enthusiasm, and providing an avenue to challenge and stretch students’ mathematical potential.

Official: https://www.nushigh.edu.sg/news-and-events/primary-school-competitions/mathematical-olympiad-of-sg/introduction/

2 | Eligibility & registration (what is published)

From NUS High’s NMOS rules/FAQ pages:

• Eligibility: The rules page states the competition is open to Primary 5 school students only.
• Registration: The rules page and FAQ state participants must register via their respective primary schools and that no individual registration is allowed.
• Dates and fees: The rules page publishes year-specific details (e.g., the NMO∑ 2025 page lists a registration window and a per-participant fee). Treat these as year-specific until NMOS 2026 details are published.

Rules: https://www.nushigh.edu.sg/news-and-events/primary-school-competitions/mathematical-olympiad-of-sg/rules-and-regulations/\ FAQ: https://www.nushigh.edu.sg/news-and-events/primary-school-competitions/mathematical-olympiad-of-sg/faq/

3 | Paper format & allowed aids (year-specific; verify before training)

The rules page publishes the paper format and allowed aids for the current listed year. For example, the current published rules page states:

• No calculators are allowed.