The current competition is the Raffles Mathematical Olympiad (RMO). Raffles Institution states that it was previously called the Raffles Institution Primary Mathematics World Contest (RIPMWC). BTT therefore uses RMO as the canonical owner and keeps RIPMWC only as a historical/search bridge.
RMO 2026 categories
- Junior: Primary 4–5
- Open: Primary 6
Round 1
Round 1 is online and conducted in participating MOE primary schools. It is a 60-minute paper with 20 multiple-choice questions common to both categories. Calculators are not allowed. The 2026 Round 1 was held on 9 April.
Round 2
Only a small invited group from each category progresses. Round 2 is a 60-minute written paper at Raffles Institution. Junior uses short-answer problems; Open includes short answers plus questions that require working to justify answers.
Registration
RMO states that students register through their MOE primary schools; individual/private registration is not allowed for the current competition route.
Preparation
- Strong arithmetic and fraction reasoning
- Pattern recognition
- Geometry and spatial reasoning
- Systematic counting
- No-calculator fluency
- For Open Round 2, written justification
Use RMO past questions to study mathematical ideas, not to memorise recurring surface patterns.
Official source checked 26 September 2026: Raffles Institution RMO 2026 organiser page and student guide.
Raffles Mathematical Olympiad preparation: use the historical route without freezing it in time
Treat the former RIPMWC/RMO history as context
Competition names, formats and organising arrangements can evolve. Historical papers are useful for understanding problem style and difficulty, but current participation details should always come from the organiser or school.
Diagnose by domain
Classify past problems into number theory, combinatorics, geometry, algebra and mixed reasoning. This shows whether a student’s difficulty comes from missing domain knowledge or from strategy selection under unfamiliar presentation.
Start with accessible problems and analyse them deeply
A learner gains more from fully understanding three problems than from skimming twenty solutions. Attempt independently, record failed routes, study a solution, close it, then reconstruct the argument later.
Build systematic casework
Many competition problems reward complete organisation. Lists, tables, parity splits and symmetry can prevent missed or duplicated cases. Require the student to explain why the case set is exhaustive.
Strengthen number structure
Factors, divisibility, remainders, parity and prime structure are high-yield areas because they extend school arithmetic into proof-oriented reasoning without requiring advanced notation.
Use geometry as reasoning
Angle facts, similarity, area relationships and auxiliary constructions should be justified. Do not let a neat diagram substitute for proof.
Introduce proof language
Even if a particular paper uses short answers, written explanations improve transfer. Ask why the answer is forced and why alternatives fail.
Simulate only after learning
Timed past papers are useful near competition conditions, but early preparation should be untimed enough for genuine problem solving. A student who immediately checks solutions trains recognition, not persistence.
Review the paper after the score
Sort questions into solved cleanly, solved inefficiently, almost solved, and not understood. The ‘almost’ category often offers the best next learning because the missing idea is within reach.
Keep the route current
This page should preserve the former RIPMWC/RMO preparation knowledge while clearly separating archival format from current competition facts. When organisers publish a new format, update the dated facts without discarding the durable problem-solving system.
World Mathematics route: return to the World Mathematics Atlas for the wider map across competitions, school Mathematics, examinations, mathematical objects and university routes.