Keystones — Lintel
Five GCSE retrieval questions · 27 February 2026 · mathsvault.uk/keystones
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1. Number Mixed index laws
Simplify: (a4)4 × a2
Answer: a18 -
2. Algebra Unknowns on both sides
Solve: 4x + 11 = x - 7
Answer: x = 6 -
3. Geometry Distance between two points
Calculate the distance between (4, 8) and (7, 12)
Answer: 5 -
4. Ratio Repeated percentage change
A car worth £12,178.00 depreciates by 21% each year for 5 years. What is it worth after 5 years?
Answer: £3,747.24 -
5. Statistics Median
Find the median of: 49, 54, 37, 70, 41, 41, 46, 54, 36
Answer: 46