O Level Math Challenge: IGCSE

O Level Math Challenge is a focused practice app for Cambridge O Level / IGCSE Mathematics students — built to make daily revision quick, honest, and a little competitive. WHY STUDENTS USE IT Practise with quick, timed 10-question quizzes across 58 topics covering the full Core and Extended syllabus. Every quiz is graded instantly (A* to E) with a question-by-question breakdown and a worked explanation, so you know exactly what to revise next — not just what you got wrong. OVER 1,700 ORIGINAL QUESTIONS Number Concepts • Indices & Roots • Algebraic Indices & Exponential Equations • Estimation, Rounding & Calculator Use • Algebra Basics • Expanding & Factorising • Lines, Angles & Shapes • Geometrical Terms & Properties • Collecting & Displaying Data • Classifying & Interpreting Data • Fractions & Standard Form • Percentages & Percentage Change • Equations & Formulae • Simultaneous Equations • Perimeter, Area & Volume • Circles, Arcs & Sectors • Surface Area & Volume of Solids • Introduction to Probability • Relative & Expected Frequency • Sequences & Sets • Sequences & nth Term • Sets & Venn Diagrams • Surds • Straight Lines & Quadratics • Coordinate Geometry • Pythagoras & Similar Shapes • Similar Shapes: Area & Volume • Averages & Spread • Understanding Measurement • Time, Timetables & Money • Bounds & Limits of Accuracy • Solving Inequalities • Quadratic Formula & Completing the Square • Algebraic Fractions • Trigonometry & Bearings • Sine & Cosine Rules • Exact Values & 3D Trigonometry • Scatter Diagrams & Correlation • Managing Money • Exponential Growth & Decay • Curved Graphs • Sketching & Interpreting Graphs • Gradients & Derivatives • Symmetry & Loci • Constructions, Nets & Scale Drawings • Circle Theorems • Histograms & Frequency Diagrams • Cumulative Frequency • Ratio, Rate & Proportion • Distance-Time & Speed-Time Graphs • Graphs in Practical Situations • Direct & Inverse Proportion • Functions & Further Equations • Composite & Inverse Functions • Transformations • Vectors • Probability Trees & Venn Diagrams • Conditional Probability STUDY YOUR WAY • No account needed — play as a guest and your progress stays on your device • Create a free account (email or Google) to keep progress on every device • Track your best grade on every topic and revisit your quiz history any time • Filter topics by Core or Extended, and spot new topics with the NEW tag COMPETE WITH CLASSMATES — PRIVATELY • Create or join up to 5 friend groups with a simple invite code • See a ranked leaderboard inside each group — no public rankings, no chat, no strangers • Group owners can remove members or delete the group YOUR DATA, YOUR CALL Delete your account and all your data any time from inside the app (Account tab). No ads, no tracking — just focused revision. Whether you've got 10 minutes before class or a full evening of revision ahead, O Level Math Challenge helps you find the gaps in your understanding and close them, one quiz at a time.

What's new in 1.2: • 20 new topics — Percentages, Exponential Growth & Decay, Simultaneous Equations, Sets & Venn Diagrams, Coordinate Geometry, Circles & Sectors, Solids, Similar Shapes and more. Now 58 topics covering the whole syllabus • Almost 500 new questions with worked explanations • Performance and stability fixes