Keystones — Lintel

Five GCSE retrieval questions · 18 May 2026 · mathsvault.uk/keystones

1. Number

Calculate: 455 + 503

Answer: 455 + 503 = 958
2. Algebra

Solve: ^x⁄₂ = 11

Answer: x = 22
3. Geometry

Adjacent = 26cm, hypotenuse = 45cm. Find the angle

Answer: 54.7°
4. Ratio

Simplify: 18:9:15

Answer: 6:3:5
5. Statistics

Find the range of: -13, -22, 41, 9, 10

Answer: 63

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