Keystones — Lintel
Five GCSE retrieval questions · 25 July 2026 · mathsvault.uk/keystones
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1. Number Mixed index laws
Simplify: y2 × (y2)4 ÷ y1
Answer: y9 -
2. Algebra Unknowns on both sides
Solve: 8x - 3 = 2x + 21
Answer: x = 4 -
3. Geometry Distance between two points
Find the distance between (-4, 2) and (10, 10)
Answer: 16.12 -
4. Ratio Repeated percentage change
A car worth £18,525.00 depreciates by 13% each year for 5 years. What is it worth after 5 years?
Answer: £9,233.25 -
5. Statistics Median
Find the median of: 57, 27, 48, 59, 39, 44, 46, 66, 20, 80, 66
Answer: 48