Keystones — Lintel

Five GCSE retrieval questions · 7 August 2025 · mathsvault.uk/keystones

1. Number

Calculate: 991 + 824

Answer: 1815
2. Algebra

Solve: ^x⁄₈ = 4.875

Answer: x = 39
3. Geometry

Adjacent = 30cm, hypotenuse = 44cm. Find the angle

Answer: 47°
4. Ratio

Find 75% of 292

Answer: 219
5. Statistics

Calculate the mean of: 36, 8, 5, 40, 27, 40

Answer: 26

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