Keystones — Lintel
Five GCSE retrieval questions · 11 September 2026 · mathsvault.uk/keystones
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1. Number Mixed index laws
Simplify: y5 × (y2)4 ÷ y1
Answer: y12 -
2. Algebra Unknowns on both sides
Solve: 6x - 8 = 3x + 22
Answer: x = 10 -
3. Geometry Distance between two points
Calculate the distance between (2, 4) and (5, 8)
Answer: 5 -
4. Ratio Repeated percentage change
A value of 343 increases by 10% each year for 3 years. Final value?
Answer: 456.53 -
5. Statistics Median
Find the median of: 42, 78, 48, 48, 69, 73, 42, 64, 67
Answer: 64