Keystones — Lintel
Five GCSE retrieval questions · 16 April 2026 · mathsvault.uk/keystones
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1. Number Mixed index laws
Simplify: (a4)2 × a3
Answer: a11 -
2. Algebra Unknowns on both sides
Solve: 6x + 4 = 4x - 5
Answer: x = 4.5 -
3. Geometry Distance between two points
Find the distance between (-6, -6) and (8, 11)
Answer: 22.02 -
4. Ratio Repeated percentage change
A car worth £18,417.00 depreciates by 17% each year for 3 years. What is it worth after 3 years?
Answer: £10,530.60 -
5. Statistics Median
Calculate the median of: 27, 31, 37, 30, 12, 16
Answer: 28.5