Keystones — Lintel

Five GCSE retrieval questions · 16 April 2026 · mathsvault.uk/keystones

1. Number

Calculate: ¹⁄₅ + ³⁄₄ + ³⁄₄

Answer: ¹⁷⁄₁₀
2. Algebra

Solve: ^x⁄₅ = 4

Answer: x = 20
3. Geometry

Opposite = 9cm, adjacent = 10cm. Calculate the angle

Answer: 42°
4. Ratio

Simplify the ratio 8m:800cm

Answer: 1:100
5. Statistics

Calculate the mean of: 28, 35, 32, 15, 49, 34, 9, 40

Answer: 30.3

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