Timed practice quizzes for Cambridge O Level & IGCSE Mathematics — instant grading and private Friend Group leaderboards.
Get it on Google PlayO Level Math Challenge is a revision app built by Homilabs for students preparing for Cambridge O Level / IGCSE Mathematics exams. Practice with quick, timed 10-question quizzes, get graded instantly (A* to E) with a full explanation for every question, and track exactly which topics need more work before your next test.
58 topics covering every sub-heading of the Cambridge O Level / IGCSE syllabus — Number, Algebra, Coordinate Geometry, Geometry, Mensuration, Trigonometry, Vectors, Probability and Statistics, Core and Extended — with over 1,700 original questions.
Every quiz is graded A*–E immediately, with a question-by-question breakdown and explanation.
No account needed to start practicing — progress is saved on your device.
Sign in with email or Google to keep your progress on every device. Delete your account any time from inside the app.
Create or join up to 5 private groups with a simple invite code and see how you rank against your classmates — no public rankings, no chat.
A focused, distraction-free practice tool — no ads interrupting your revision.
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