Keystones — Lintel
Five GCSE retrieval questions · 4 June 2026 · mathsvault.uk/keystones
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1. Number Mixed index laws
Simplify: y2 × (y4)3 ÷ y3
Answer: y11 -
2. Algebra Unknowns on both sides
Solve: 10x - 7 = 7x + 17
Answer: x = 8 -
3. Geometry Distance between two points
Calculate the distance between (9, 1) and (12, 5)
Answer: 5 -
4. Ratio Repeated percentage change
A value of 422 increases by 11% each year for 3 years. Final value?
Answer: 577.14 -
5. Statistics Median
Find the median of: 61, 67, 20, 54, 79, 28, 71, 28, 57, 24
Answer: 57