Keystones — Lintel

Five GCSE retrieval questions · 13 September 2025 · mathsvault.uk/keystones

1. Number

Calculate: ¹⁄₂ + ²⁄₅ + ¹⁄₄

Answer: ²³⁄₂₀
2. Algebra

Solve: ^x⁄₅ = 3.2

Answer: x = 16
3. Geometry

Opposite = 14cm, adjacent = 20cm. Calculate the angle

Answer: 35°
4. Ratio

Calculate 37.2% of 996

Answer: 370.51
5. Statistics

Find the range of: 28, -23, -23, 41, -5

Answer: 64

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