NMOS: the one-shot contest — a P5 parent’s decision guide

NMOS is offered in Primary 5 only and never comes round again, so there is no second attempt. It is a single 90-minute paper of 35 questions, registered through the school. NUS High publishes the award tiers but no percentage cut-offs, so nobody can tell you the real odds of a Gold.

Why this one is different

Every other contest on this site comes round again. NMOS does not. It is offered in Primary 5 only, so a child gets one attempt and then it is gone — there is no trying again next year with another year of maturity behind them.

That single fact should change how you treat it. A first contest normally works best as a low-stakes rehearsal, but NMOS cannot be a rehearsal for itself. If your child has never sat a contest paper, sitting something else first — SASMO is the one a parent can enter directly — means NMOS is not also their first experience of the format.

The format

• 35 questions in 90 minutes, one round.
• Primary 5 only.
• Registered through the school — not available to private candidates.

From 2024 NMOS narrowed to Primary 5 only and dropped its Special Round, becoming a single 90-minute paper. Entries fell from roughly 5,500 to roughly 3,000, which makes the field smaller but considerably more selected.

A smaller field is not an easier field. The pupils who no longer enter are largely the younger ones who were least likely to place, so the children remaining are more selected than the old entry numbers suggest.

What are the odds of an award?

Nobody outside the organiser can tell you honestly. The tiers are Gold, Silver, Bronze, Honourable Mention, Participation — and that is the entire published picture.

NUS High publishes the award tiers but no percentage or percentile cut-off for any of them. Any "top X% gets Gold" figure you find for NMOS is a third-party estimate, not the organiser's. We would rather tell you the split is unpublished than repeat a number nobody stands behind.

What the organiser does publish:

• A trophy goes to the top 20 school teams, scored on the combined total of the top four scorers from the same school.
• A certificate goes to the top-performing girl in each participating school, provided she reaches at least Silver.
• Detailed results are released through the schools, not published centrally.

We publish SASMO's award percentages elsewhere on this site because SASMO publishes them. NMOS does not, and inventing a plausible-looking figure to fill the gap is exactly the practice this site exists to avoid.

How to decide

Reasonable to sit it if: your child is in P5, has already met contest-style problems somewhere, and would treat an unfamiliar paper as interesting rather than threatening. The school registers pupils, so the practical question is often just whether yours does.

Think twice if: it would be their first contest ever, or if it lands in a term that is already heavy. P5 is a demanding syllabus year in its own right, and NMOS sits inside it rather than beside it.

NMOS, APMOPS and RMO are registered through the school. SASMO is the one a parent can enter directly as a private candidate.

Offered in P5 only. Never offered again.

Sources

• NMOS awards page, NUS High School
• Format and eligibility as published for the current cycle

Last verified: 2026-08-05