Keystones — Capstone
Five GCSE retrieval questions · 4 May 2026 · mathsvault.uk/keystones
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1. Number Index law — powers of powers
Simplify: ((a3)2)3
Answer: a18 -
2. Algebra Quadratic nth term
Determine the nth term: 5, 14, 29, 50, ...
Answer: 3n² + 2 -
3. Geometry Equation of a circle
State the equation of a circle with centre (7, 4) and radius 3
Answer: (x - 7)² + (y - 4)² = 9 -
4. Ratio Changing a ratio
In ratio 5:4, if the second quantity is 38, what is the first?
Answer: 47.5 -
5. Statistics Range
Find the range of: 32, 42, 29, 9, -22
Answer: 64