: The Education Bureau maintains an archive of related mathematical olympiad materials dating back to 1983. Competition Structure (Senior Secondary)
If you get a question wrong, don't just look at the answer. Re-read the question, try to solve it again, and only then check the provided solution to understand the strategy you missed. 3. Master the Solutions
You can find official and community-contributed past papers through these platforms:
: Provides registered users with past paper access and answer keys. hkimo+past+papers+senior+secondary
Grade your paper. For every question you got wrong or failed to answer, classify the error into one of three categories:
The official HKIMO organization sometimes posts sample papers or "Heat Round" solutions from the previous 1-2 years. Check their downloads section during January-March (competition season).
When tackling combinatorics, consider the maximum or minimum cases first. : The Education Bureau maintains an archive of
Using past papers is not just about testing your current knowledge; it is about adapting to the specific ecosystem of the Olympiad.
Prime factorization, Greatest Common Divisors (GCD), Least Common Multiples (LCM).
You knew how to solve it but made a basic arithmetic or algebraic mistake. For every question you got wrong or failed
Logarithms, complex numbers, polynomials, and advanced algebra. Number Theory: Modulo arithmetic, prime factorization, and divisibility. Trigonometry, circle theorems, and coordinate geometry. Combinatorics: Permutations, combinations, and advanced probability. Heat Round: 25 short questions (5 per area); 90-minute duration. Final Round: 30 short questions (6 per area); 120-minute duration. Calculators: Forbidden in all rounds. 2. Accessing Past Papers & Resources
: A major source for downloadable PDFs, including: HKIMO 2020 Senior Secondary Heat Paper HKIMO 2023 Senior Secondary Solutions HKIMO 2018 Senior Secondary Paper HKIMO Senior Secondary Mock Paper