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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.

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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.

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