Number and types of number
The words that sort every number into its box — natural, integer, prime, square, cube, rational, irrational — plus the tools built on them: prime factorisation, HCF and LCM, set notation with Venn diagrams, powers and roots, reciprocals, and the inequality symbols used to put numbers in order.
CoreEvery candidate
- 1.1Identify and use natural numbers, integers (positive, zero and negative), prime numbers, square numbers, cube numbers, common factors, common multiples, rational and irrational numbers, and reciprocals.
- 1.1Use number types in context: convert between numbers and words, express a number as a product of its prime factors, and find the highest common factor and lowest common multiple of two numbers.
- 1.2Understand and use set language, notation and Venn diagrams limited to two sets, including n(A) for the number of elements, A′ for the complement, and union and intersection.
- 1.3Calculate with squares, square roots, cubes, cube roots and other powers and roots, recalling squares and roots up to 15² and cubes of 1, 2, 3, 4, 5 and 10.
- 1.5Order quantities by magnitude and use the symbols =, ≠, >, <, ⩾ and ⩽ correctly.
- 1.5Order exact values given in different forms — integers, fractions and decimals — by converting to a common form; ordering surds and powers extends this with Extended-only number types.
ExtendedExtended candidates only
- 1.2Extend set notation with the element symbols ∈ and ∉, the empty set ∅, and subset notation; use Venn diagrams with up to three sets.
- 1.3Evaluate fractional powers such as 16^(1/2) and 8^(1/3) and negative powers of whole numbers in exact form.
Fractions, decimals and percentages
One idea in three outfits: a fraction, a decimal and a percentage are the same amount in different clothing. Convert fluently between them (including recurring decimals at Extended), add and multiply mixed numbers, work out percentage change and reverse percentages, grow money with simple and compound interest, and handle time, timetables and currency without slipping.
CoreEvery candidate
- 1.4Use the language and notation of proper fractions, improper fractions, mixed numbers, decimals and percentages, writing fractions in their simplest form.
- 1.4Recognise equivalence and convert between fractions, decimals and percentages.
- 1.6Use the four operations for calculations with integers, fractions and decimals, including correct ordering of operations and use of brackets, negative numbers, improper fractions and mixed numbers.
- 1.13Calculate a given percentage of a quantity, express one quantity as a percentage of another, and calculate percentage increase or decrease.
- 1.13Calculate with simple and compound interest (formulas are not given).
- 1.14Use a calculator efficiently: do not round values mid-calculation, enter times and money appropriately, and interpret displays (excluded from the non-calculator papers).
- 1.15Calculate with units of time, use the 12-hour and 24-hour clock, and read clocks and timetables, including time zones.
- 1.16Calculate with money and convert from one currency to another.
ExtendedExtended candidates only
- 1.4Use recurring decimal notation and convert between recurring decimals and fractions.
- 1.13Solve problems with repeated percentage change and reverse percentages, and apply percentages to deposits, discounts, profit and loss, earnings and percentages over 100%.
- 1.17Use exponential growth and decay, e.g. depreciation and population change (no e required).
Ratio, proportion and rates
Ratio splits amounts fairly by a recipe — simplify it, divide in it, scale it for a map or a menu. Proportion lets one quantity drive another, from doubling a recipe to inverse square laws at Extended. Rates bundle distance, money and flow per unit of time, with speed, density and pressure as the examined headline acts.
CoreEvery candidate
- 1.11Understand and use ratio to give ratios in their simplest form, divide a quantity in a given ratio, and use proportional reasoning and ratios in context such as recipes, map scales and best value.
- 1.12Use common measures of rate, e.g. hourly rates of pay, exchange rates between currencies, flow rates and fuel consumption.
- 1.12Apply other measures of rate, e.g. pressure, density and population density, using formulas given in the question.
- 1.12Solve problems involving average speed, using speed = distance ÷ time.
ExtendedExtended candidates only
- E2.8Express direct and inverse proportion in algebraic terms, including linear, square, square root, cube and cube root proportion, and use the form to find unknown quantities. The symbol ∝ is required. (Extended)
Indices, surds and standard form
Three tools for writing very big and very small numbers exactly: the index laws that collapse products into single powers, standard form A × 10ⁿ that keeps astronomy and microbes on the same page, and surds that keep square roots exact. Non-calculator papers reward every one of these.
CoreEvery candidate
- 1.7Understand and use indices with positive, zero and negative integer powers, and use the rules of indices.
- 1.8Use standard form A × 10ⁿ where n is a positive or negative integer and 1 ⩽ A < 10, and convert numbers into and out of standard form.
- 1.8Calculate with values in standard form (Core candidates are expected to calculate with standard form only on Paper 3).
ExtendedExtended candidates only
- 1.7Understand and use fractional indices, e.g. 16^(1/2) and 8^(1/3), alongside the index laws. (Extended)
- 1.18Understand and use surds, including simplifying expressions such as √20 = 2√5 and √200 − √32 = 6√2. (Extended)
- 1.18Rationalise the denominator of a fraction involving a surd. (Extended)
Estimation and bounds
How to say “about how much” convincingly: round to decimal places or significant figures, estimate hard calculations by simplifying every number to one significant figure, and — at Extended — trap a rounded measurement inside upper and lower bounds, then push those bounds through perimeters, areas and speeds.
CoreEvery candidate
- 1.9Round values to a specified degree of accuracy, including decimal places and significant figures.
- 1.9Make estimates for calculations involving numbers, quantities and measurements, e.g. by rounding each number to 1 significant figure.
- 1.9Round answers to a reasonable degree of accuracy in the context of a given problem.
- 1.10Give upper and lower bounds for data rounded to a specified accuracy.
ExtendedExtended candidates only
- 1.10Find upper and lower bounds of the results of calculations which have used data rounded to a specified accuracy, e.g. bounds of a perimeter, area or speed. (Extended)
Algebraic manipulation
The grammar of algebra: swap letters for numbers, multiply brackets out cleanly, then run the process backwards — pulling common factors out, spotting the difference of two squares, factorising quadratics, completing the square, and cancelling rational expressions the honest way.
CoreEvery candidate
- 2.1Use letters to generalise numbers, and substitute numbers into expressions and formulas.
- 2.2Collect like terms, and expand brackets: two brackets of the form (x ± a)(x ± b) at Core, three brackets with two variables at Extended.
- 2.2Factorise by taking out common factors, and factorise quadratic expressions including the difference of two squares.
ExtendedExtended candidates only
- 2.2Factorise expressions of the form ax² + bx + c and ax³ + bx² + cx, and complete the square for quadratic expressions. (Extended)
- 2.3Add, subtract, multiply and divide algebraic fractions, and simplify rational expressions by factorising and cancelling a common factor. (Extended)
Equations and inequalities
Getting from “what is true” to “what is the number”: undo linear equations in tidy steps, trap two unknowns with simultaneous pairs, crack quadratics by factorising or the formula, rearrange formulas for any letter, and solve inequalities without flipping a sign at the wrong moment.
CoreEvery candidate
- 2.5Construct expressions, equations and formulas, and solve linear equations, including those with brackets and fractions.
- 2.5Derive and solve simultaneous linear equations in two unknowns.
- 2.6Represent and solve linear inequalities in one variable, and show solutions on a number line.
ExtendedExtended candidates only
- 2.5Solve quadratic equations by factorising, completing the square and using the quadratic formula (given); solve one linear and one non-linear equation simultaneously; change the subject of formulas, including cases with powers, roots and two steps. (Extended)
- 2.6Represent and interpret inequalities in two variables graphically, listing the inequalities that define a region. (Extended)
Sequences
Reading the rhythm of a list of numbers: describe it term by term, then compress it into an nth term you can evaluate anywhere — differences for linear runs, second differences for quadratics, pattern-hunting for cubics and for the doubling-and-halving geometric families.
CoreEvery candidate
- 2.7Continue a given sequence and describe its term-to-term rule, including patterns of shapes or objects.
- 2.7Find and use the nth term of a linear sequence and of simple quadratic and cubic sequences.
- 2.7Express a general term from a context — matchstick or dot patterns — and decide whether a value can be a term.
ExtendedExtended candidates only
- 2.7Find and use the nth term of exponential (geometric) patterns, and of sequences built from combinations of rules. (Extended)
Graphs of functions
Pictures that calculate: read rates straight off travel and conversion graphs, treat area under a speed–time graph as distance, build tables of values and plot them accurately, harvest roots and intersections from a curve, and sketch the classic families — parabolas, cubics, reciprocals and exponentials.
CoreEvery candidate
- 2.9Interpret and use conversion graphs and travel (distance–time) graphs, with gradient as a rate of change.
- 2.10Draw and read graphs of linear functions, quadratic functions and the reciprocal function a⁄x from tables of values; Extended candidates also draw sums of powers and exponential graphs.
- 2.10Use graphs to solve equations, including finding roots and intersections with drawn lines.
ExtendedExtended candidates only
- 2.9Work with speed–time graphs, including acceleration and deceleration as gradients, and distance as the area under the graph (linear sections only). (Extended)
- 2.11Sketch and interpret linear and quadratic graphs (roots and symmetry), and — at Extended — cubic, reciprocal and exponential graphs, with turning points and asymptotes.
Functions and differentiation
The Extended-only toolkit: feed numbers through function machines forwards and backwards, compose two functions in the right order, then switch to calculus — differentiate powers of x, hunt stationary points, classify them as maxima or minima, and pin tangents onto curves.
ExtendedExtended candidates only
- 2.13Use function notation, and determine the domain and range of a function. (Extended)
- 2.13Find the inverse of a one-one function and form composite functions such as gf(x) = g(f(x)). (Extended)
- 2.12Differentiate sums of multiples of powers of x, and use the dy⁄dx notation. (Extended)
- 2.12Find the gradient of a curve at a point, and the equation of a tangent at that point. (Extended)
- 2.12Find and classify stationary points as maxima or minima, using a sketch, the second derivative or the gradient either side. (Extended)
Coordinate geometry
Algebra meets the x–y plane: measure a line’s slope from any two points, halve a segment to its midpoint, stretch Pythagoras across it for its length, then write equations — including the parallel clone and the perpendicular twin, all the way up to bisectors (Extended).
CoreEvery candidate
- 3.1Use Cartesian coordinates in two dimensions to describe and locate points.
- 3.2Draw and interpret straight-line graphs of the form y = mx + c, and read gradients from a grid; rearrange equations like ax + by = c to find the gradient. (Extended for two-point gradients and ax + by = c)
- 3.5Find the equation of a straight line from its gradient and a point on it, in the form y = mx + c.
- 3.6Find the gradient and equation of parallel lines.
ExtendedExtended candidates only
- 3.4Calculate the length and the coordinates of the midpoint of a line segment. (Extended)
- 3.7Use perpendicular gradients (products of −1) and find the equation of a perpendicular bisector. (Extended)
Geometry, angles and polygons
Angle-chasing with receipts: every fact worth a mark — straight lines, full turns, triangles, parallel-line pairs — plus the polygon machinery of interior and exterior angles, the area and volume tricks of similar shapes, and bearings measured the sailor’s way.
CoreEvery candidate
- 4.6Use angle properties: angles at a point (360°), angles on a straight line (180°), vertically opposite angles, angles of triangles and quadrilaterals.
- 4.6Use angle properties of parallel lines — corresponding, alternate and co-interior — giving reasons.
- 4.6Use interior and exterior angles of regular polygons, including the sums 180(n − 2) and 360.
- 4.5Recognise line and rotational symmetry in 2-D shapes.
- 4.3Interpret scale drawings and use three-figure bearings measured clockwise from north.
ExtendedExtended candidates only
- 4.4Use similarity: calculate unknown lengths in similar shapes, and — at Extended — areas (× length²) and volumes (× length³).
Circle theorems
Six theorems and a pile of isosceles triangles: double angles from centre to rim, harvest equal angles from the same segment, close cyclic quadrilaterals to 180°, bounce tangents off radii, and let the alternate segment hand you angles nobody drew yet.
CoreEvery candidate
- 4.7Use the angle in a semicircle (90°) and the perpendicularity of a tangent and the radius at the point of contact.
ExtendedExtended candidates only
- 4.7Use the angle at the centre (twice the angle at the circumference on the same arc) and angles in the same segment. (Extended)
- 4.7Use opposite angles of a cyclic quadrilateral summing to 180° and the alternate segment theorem. (Extended)
- 4.8Use properties of chords: the perpendicular from the centre bisects a chord, and equal chords are equidistant from the centre. (Extended)
- 4.8Use equal tangents from an external point and the isosceles triangles formed by radii. (Extended)
Transformations and vectors
Move whole shapes with four machines — flip, spin, slide, stretch — and describe each move precisely; then upgrade points to column vectors and push them around with addition, scalars and magnitudes, finishing with vector proofs on parallelograms (Extended).
CoreEvery candidate
- 7.1Reflect in horizontal and vertical lines, rotate about the origin through multiples of 90°, translate by a vector, and enlarge from a centre with positive and fractional scale factors.
ExtendedExtended candidates only
- 7.1Reflect in any straight line, enlarge with negative scale factors, and describe combined transformations. (Extended)
- 7.2Use column-vector notation, adding and subtracting vectors and multiplying by scalars. (Extended)
- 7.3Calculate the magnitude of a vector as √(x² + y²). (Extended)
- 7.4Use directed line segments and position vectors, express vectors in terms of two others, and prove lines parallel or collinear. (Extended)
Mensuration
Measure everything: convert units without losing zeros, find perimeters and areas of the standard plane shapes, slice circles into arcs and sectors, and box, roll and round shapes into prisms, cylinders, cones and spheres.
CoreEvery candidate
- 5.1Use metric units of length (mm, cm, m, km), mass (g, kg, tonne), time, area (mm² to km²), volume (mm³ to m³) and capacity (ml, litres); convert between them, including area units such as cm² ↔ m² and volume ↔ capacity such as m³ ↔ litres.
- 5.2Carry out calculations of perimeter and area of rectangles, triangles, parallelograms and trapeziums (only the triangle area formula is given on the formula sheet).
- 5.3Calculate the circumference and area of a circle; calculate arc length and sector area as fractions of the circle (Core: sector angles that are factors of 360°).
- 5.4Carry out calculations of the surface area and volume of cuboids, prisms and cylinders.
- 5.5Carry out calculations of perimeter and area of compound shapes, and volume and surface area of compound solids. (Extended for parts of solids such as hemispheres and frustums.)
ExtendedExtended candidates only
- 5.3Calculate arc length and sector area for any angle, and distinguish minor and major sectors; give answers in terms of π where asked. (Extended)
- 5.4Carry out calculations of the surface area and volume of spheres, pyramids and right circular cones, including curved surface areas. (Extended)
Trigonometry
From ladder-on-a-wall Pythagoras to full sine-rule navigation: pick the right ratio, keep the calculator in degrees, and climb from right-angled triangles to exact values, trig equations and 3-D diagonals (Extended).
CoreEvery candidate
- 6.1Know and use Pythagoras’ theorem in right-angled triangles.
- 6.2Use sine, cosine and tangent in right-angled triangles to find sides and angles, and solve 2-D problems; give angles to 1 decimal place.
ExtendedExtended candidates only
- 6.2Use trigonometry for the shortest distance from a point to a line, and for angles of elevation and depression. (Extended)
- 6.3Know the exact values of sin and cos at 0°, 30°, 45°, 60° and 90°, and of tan at 0°, 30°, 45° and 60°. (Extended)
- 6.4Sketch y = sin x, y = cos x and y = tan x for 0° ⩽ x ⩽ 360°, and solve simple trigonometric equations in that interval. (Extended)
- 6.5Use the sine and cosine rules (formulas given) in non-right-angled triangles, including obtuse cases, and use area = ½ab sin C. (Extended)
- 6.6Use Pythagoras’ theorem and trigonometry in 3-D, including the angle between a line and a plane. (Extended)
Probability
Put chance on the 0-to-1 line, estimate it from experiments, then combine events with sample spaces, Venn diagrams and tree diagrams — finishing with conditional probabilities read straight off tables (Extended).
CoreEvery candidate
- 8.1Place events on the probability scale from 0 (impossible) to 1 (certain); calculate the probability of a single event as a fraction, decimal or percentage; use P(not A) = 1 − P(A); read probabilities from tables, graphs and two-set Venn diagrams.
- 8.2Use relative frequency as an estimate of probability and calculate expected frequency; use the language of fair, biased and random.
- 8.3List outcomes with sample space diagrams and Venn diagrams; calculate probabilities of two combined events using tree diagrams with replacement.
ExtendedExtended candidates only
- 8.1Use P(A) and P(A′) notation and interpret Venn diagrams with more than two sets. (Extended)
- 8.3Use tree diagrams with and without replacement, and combine events with and-and-or structure, multiplying along branches and adding between them. (Extended)
- 8.4Work out conditional probabilities from Venn diagrams, tree diagrams and two-way tables. (Extended)
Statistics
Turn raw numbers into answers: sort data into two-way tables, summarise with mean, median, mode and range, draw pie charts and stem-and-leaf diagrams, then predict with lines of best fit and read off quartiles (Extended).
CoreEvery candidate
- 9.1Collect, classify and tabulate statistical data, including tally charts and two-way tables.
- 9.2Read, interpret and compare sets of data from tables and diagrams, recognising the limitations of conclusions. (Extended also compares measures of spread.)
- 9.3Calculate the mean, median, mode and range of ungrouped data, and the mean, median and mode from an ungrouped frequency table.
- 9.4Draw and interpret bar charts (composite and dual), pie charts, pictograms, stem-and-leaf diagrams (ordered, with a key) and simple frequency distributions.
- 9.5Draw and interpret scatter diagrams; describe positive, negative or zero correlation; draw and use a line of best fit by eye across the whole data set.
ExtendedExtended candidates only
- 9.3Calculate an estimate of the mean of grouped data using class midpoints, and identify the modal class; use quartiles and the interquartile range. (Extended)
- 9.6Draw and interpret cumulative frequency diagrams, reading estimates of the median, quartiles, interquartile range and percentiles from the curve. (Extended)
- 9.7Draw and interpret histograms, including those with unequal class intervals using frequency density. (Extended)