NMOS 2026: Date, Format, Awards and Eligibility

Q: What is the NMOS 2026 format?
A: NMO∑ 2026 is one 90-minute written paper with 35 questions. It is held at participating schools on 14 July 2026 in a 90-minute slot between 2pm and 4:30pm. The current organiser rules do not describe separate Heat and Special rounds for 2026.

Quick facts
NMOS is for Primary 5 students only. Schools register participants; individual registration is not allowed. The 2026 fee is 25 Singapore dollars including GST and is non-refundable. Calculators are not allowed.

Last reviewed: 18 July 2026. The NUS High news, introduction, rules, awards, FAQ, book-sales, and published-solution pages were checked together.

What NMOS is

The National Mathematical Olympiad of Singapore, stylised NMO∑, is an NUS High School initiative run in partnership with the Singapore Mathematical Society. NUS High describes it as a way to generate interest in mathematics and challenge students' mathematical potential.

Eligibility and registration

The 2026 rules state:

• Primary 5 students only;
• registration through the student's primary school;
• no individual registration;
• registration from 20 February to 20 March 2026;
• 25 Singapore dollars per participant, including 9% GST; and
• no refund of the registration fee.

Schools have discretion to select participants. The official pages do not provide a private-entry alternative.

2026 date and format

Participating schools conduct NMOS on 14 July 2026 in any 90-minute slot from 2pm to 4:30pm.

The written paper has 35 questions: