Practice questions
Original question sets written by Per Sir, modelled on past-paper style, with answers. Free to use — no sign-up, nothing to download.
These are not reproductions of HKEAA or IBO examination questions.
Recently added
- Basic Trigonometry (Paper 1) · October 2026
- Basic Trigonometry (Paper 1 Challenge) · October 2026
- Basic Trigonometry (Paper 2 MC) · October 2026
HKDSE Mathematics
Number and Algebra
Rates, Ratios and Proportions
Ratios a : b : c, sharing in a ratio, changing ratios, map scales for length and area, average speed, work rates, travel graphs and mixtures. Modelled on 2012 to 2026 past-paper style.
Paper 1 long questions (10) · Paper 1 challenge (10) · Paper 2 multiple-choice (10) · Paper 2 challenge MC (10)
Using Percentages
Profit and loss, discount and marked price, percentage change, simple and compound interest, depreciation and salaries tax. Modelled on 2012 to 2026 past-paper style.
Paper 1 long questions (10) · Paper 1 challenge (10) · Paper 2 multiple-choice (10) · Paper 2 challenge MC (10)
Approximation and Errors
Rounding up, down and off, significant figures, upper and lower limits of a measurement, relative and percentage error, and whether a claimed total is possible. Modelled on 2012 to 2026 past-paper style.
Paper 1 long questions (10) · Paper 1 challenge (10) · Paper 2 multiple-choice (10) · Paper 2 challenge MC (10)
Linear Inequalities in One Unknown
Solving linear inequalities, compound inequalities with “and” and “or”, the integers that satisfy them, number lines and word problems. Modelled on 2012 to 2026 past-paper style.
Paper 1 long questions (10) · Paper 1 challenge (10) · Paper 2 multiple-choice (10) · Paper 2 challenge MC (10)
Elementary Algebra
Laws of indices, change of subject, expansion and factorization, identities, surds, directed numbers, and linear equations in one and two unknowns. Modelled on 2012 to 2026 past-paper style.
Paper 1 long questions (12) · Paper 1 challenge (10) · Paper 2 multiple-choice (15) · Paper 2 challenge MC (12)
Quadratic and Simultaneous Equations
Solving quadratics, the discriminant, sum and product of roots, non-real roots, and simultaneous equations with one non-linear equation. Modelled on 2012 to 2026 past-paper style.
Paper 1 long questions (12) · Paper 1 challenge (6) · Paper 2 multiple-choice (20) · Paper 2 challenge MC (10)
Functions and Graphs of Quadratic Functions
Completing the square, the vertex, axis of symmetry, translations and reflections of y = f(x), maximum and minimum values, and the discriminant read off the graph. Modelled on 2012 to 2026 past-paper style.
Paper 1 long questions (18) · Paper 1 challenge (10) · Paper 2 multiple-choice (20) · Paper 2 challenge MC (18)
More about Graphs of Functions
Translations, reflections and enlargements of y = f(x) for cubic, exponential, logarithmic and sine graphs, read from equations, points and sketches, and solving f(x) = k and f(x) > k from a graph. Modelled on 2012 to 2026 past-paper style.
Paper 1 long questions (10) · Paper 1 challenge (10) · Paper 2 multiple-choice (10) · Paper 2 challenge MC (10)
Exponential and Logarithmic Functions
Laws of logarithms and rational indices, exponential and logarithmic equations, graphs of exponential and logarithmic functions, log-linear relations, and real-life scales such as decibels and pH. Modelled on 2012 to 2026 past-paper style.
Paper 1 long questions (10) · Paper 1 challenge (10) · Paper 2 multiple-choice (10) · Paper 2 challenge MC (10)
Polynomials, Remainder and Factor Theorems
Factorization, identities, the remainder and factor theorems, H.C.F. and L.C.M. of polynomials, and algebraic fractions. Modelled on 2012 to 2026 past-paper style.
Paper 1 long questions (15) · Paper 1 challenge (10) · Paper 2 multiple-choice (25) · Paper 2 challenge MC (15)
Quadratic Inequalities
Solving quadratic inequalities by factorising, completing the square and the discriminant, with word problems. An extension topic with no past-paper model.
Paper 1 long questions (10) · Paper 1 challenge (10) · Paper 2 multiple-choice (10) · Paper 2 challenge MC (10)
Measures, Shape and Space
Centres of Triangles in the Coordinate Plane
Centroid, circumcentre, orthocentre and in-centre found with line equations: medians, perpendicular bisectors, altitudes and angle bisectors. Modelled on 2012 to 2026 past-paper style.
Paper 1 long questions (5) · Paper 1 challenge (5) · Paper 2 multiple-choice (5) · Paper 2 challenge MC (5)
Basic Trigonometry
Sine, cosine and tangent in right-angled triangles, exact values for 30°, 45° and 60°, sin²θ + cos²θ = 1 and the (90° − θ) identities, gradient, and angles of elevation and depression. Modelled on 2012 to 2025 past-paper style.
Paper 1 long questions (10) · Paper 1 challenge (10) · Paper 2 multiple-choice (10) · Paper 2 challenge MC (10)
Equations of Straight Lines
Slopes, intercepts, perpendicular bisectors, loci and the circumcentre, worked in coordinates. Modelled on 2012 to 2026 past-paper style.
Paper 1 long questions (8) · Paper 1 challenge (4) · Paper 2 multiple-choice (20) · Paper 2 challenge MC (8)
Data Handling
Data Presentation and Interpretation
Pie charts, bar charts, stem-and-leaf diagrams, histograms, frequency polygons, scatter diagrams, misleading graphs and sampling, read and interpreted without averages. Modelled on 2012 to 2026 past-paper style.
Paper 1 long questions (10) · Paper 1 challenge (10) · Paper 2 multiple-choice (10) · Paper 2 challenge MC (10)
Measures of Central Tendency and Dispersion
Mean, median and mode from tables and stem-and-leaf diagrams, weighted and grouped means, range, standard deviation, standard scores and the normal distribution. Modelled on 2012 to 2026 past-paper style.
Paper 1 long questions (8) · Paper 1 challenge (8) · Paper 2 multiple-choice (8) · Paper 2 challenge MC (8)
Quartiles, Percentiles and Cumulative Frequency
Quartiles, inter-quartile range, box-and-whisker diagrams, percentiles, and cumulative frequency tables and polygons, from ungrouped and grouped data. Modelled on 2012 to 2026 past-paper style.
Paper 1 long questions (10) · Paper 1 challenge (10) · Paper 2 multiple-choice (10) · Paper 2 challenge MC (10)
How to use these
Work a set on paper before opening any answer. The answer is worth nothing; the reason it is the answer is the whole point. If a question defeats you twice, that topic is the one to bring to a lesson.
The full courses behind these sets are on the Mathematics page.