Keystones — Lintel
Five GCSE retrieval questions · 17 April 2026 · mathsvault.uk/keystones
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1. Number Mixed index laws
Simplify: y4 × (y2)3 ÷ y1
Answer: y9 -
2. Algebra Unknowns on both sides
Solve: 10x - 7 = 2x + 17
Answer: x = 3 -
3. Geometry Distance between two points
Calculate the distance between (10, 10) and (13, 14)
Answer: 5 -
4. Ratio Repeated percentage change
A car worth £10,626.00 depreciates by 24% each year for 3 years. What is it worth after 3 years?
Answer: £4,664.56 -
5. Statistics Median
Find the median of: 23, 75, 29, 74, 59, 30, 37, 35, 49
Answer: 37