Grades 9-10: Junior

420 competition problems with step-by-step solutions.
Number theory, algebra, geometry, combinatorics, logic.

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Grades 9-10 Practice Material →

Number Theory

Modular Arithmetic Units Digits Divisibility rules Prime factorization CRT

Algebra

Systems of equations Vieta's formulas Symmetric functions Polynomial roots Functional equations

Sequences & Series

Telescoping sums Partial fractions Fibonacci sequences AP & GP

Combinatorics

Complement counting Pigeonhole principle Inclusion-exclusion Restricted arrangements Derangements

Inequalities

AM-GM inequality Optimization problems

Geometry

3D solids & sections Area ratios Inscribed circles

Functions & Graphs

Absolute value Floor function Graph transformations

Logic & Puzzles

Knights & knaves Invariants Clock problems Work rate problems

Practice Papers

4 full-length papers · 420 problems · Detailed solutions

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