Keystones — Lintel

Five GCSE retrieval questions · 30 July 2025 · mathsvault.uk/keystones

1. Number

Add: ¹⁄₃ + ³⁄₈

Answer: ¹⁷⁄₂₄
2. Algebra

Solve: 6x = 90

Answer: x = 15
3. Geometry

Adjacent = 25cm, hypotenuse = 30cm. Find the angle

Answer: 33.6°
4. Ratio

Simplify: 8:16:12

Answer: 2:4:3
5. Statistics

Calculate the mean of: 47, 45, 48, 25, 32, 23

Answer: 36.7

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