Numerical methods is Year 13 only. It is about approximating what you cannot solve exactly: locating roots, iteration, Newton-Raphson and the trapezium rule, and explaining when each method fails.
Start with one question on numerical methods. Stuck? Take a hint. No sign-in needed.
Numerical methods, calculator allowed. Use one step of the Newton–Raphson method on \(f(x) = x^{2} - 11\), starting from \(x_0 = 3\). Find \(x_1\).
Numerical methods, calculator allowed. The iteration \(x_{n+1} = \sqrt[3]{3 x_n + 7}\) starts at \(x_0 = 2\). Find \(x_2\) to 4 decimal places.
Numerical methods, calculator allowed. The iteration \(x_{n+1} = \sqrt{x_n + 3}\) starts at \(x_0 = 1.5\). Find \(x_2\) to 4 decimal places.
Numerical methods, calculator allowed. The iteration \(x_{n+1} = \sqrt[3]{10 - x_n}\) starts at \(x_0 = 1\). Find \(x_2\) to 4 decimal places.
Numerical methods, calculator allowed. Use one step of the Newton–Raphson method on \(f(x) = x^{3} - 3 x - 4\), starting from \(x_0 = 2\). Find \(x_1\).
This topic is A Level only: it is not on the AS exam.
Year 12 (AS content)
None: numerical methods starts in Year 13.
Year 13 (full A Level only)
Locating roots by a change of sign, and when the method fails
Iteration of the form xₙ₊₁ = g(xₙ), with staircase and cobweb diagrams
The Newton-Raphson method and why it can fail
The trapezium rule, and whether it over- or under-estimates
Using numerical methods to solve problems in context
Worked examplemedium3 marks
The equation $e^{2x} - 5x = 0$ has a root $\alpha$. Show that this equation can be rearranged into the iterative formula $x_{n+1} = \frac{1}{2}\ln(5x_n)$.
Mark scheme and worked answer
M1 for isolating the exponential term to get $e^{2x} = 5x$.
M1 for taking the natural logarithm of both sides: $2x = \ln(5x)$.
A1 for dividing by 2 to write it in the required iterative form $x_{n+1} = \frac{1}{2}\ln(5x_n)$.
Numerical Methods on the AQA, Edexcel and OCR papers
Every board examines the same A Level Maths content, set by the Department for Education. Only the paper it appears on and the section numbering differ.
A Level Maths numerical methods exam-style questions
Three examples from the question bank, one with its full mark scheme open. Every question comes with a step-by-step mark scheme (M, A and B marks) once you start practising.
Question 1easy3 marks
Show that the equation $x^3 - 3x + 1 = 0$ has a root $\alpha$ in the interval $[1, 2]$.
These skills sit in the Pure II unit of the UK A Level practice engine. Pick any mix of them, set the difficulty, and check each answer against its mark scheme.
Locating roots by change of signIteration x = g(x)The Newton-Raphson methodThe trapezium ruleStaircase & cobweb diagrams
Numerical methods can come up on these papers (from each board's paper structure). We haven't mapped individual questions yet, so open a recent paper and look for it.
Is numerical methods on the AQA, Edexcel and OCR A Level Maths exams?
Yes. Numerical Methods is part of the A Level Maths content that every board examines: AQA section I, Edexcel Pure 9, OCR 1.09. It is assessed in AQA Papers 1, 2 and 3; Edexcel Paper 1 and Paper 2; OCR A Paper 1, and the pure sections of Papers 2 and 3.
Is numerical methods Year 12 or Year 13 content?
Numerical Methods is A Level only, so it is usually taught in Year 13 and is not on the AS exam.
Why does the Newton-Raphson method sometimes fail?
It divides by f′(x), so it breaks down when the starting value is at or near a stationary point, and it can jump to a different root if the starting value is poor.