Keystones — Lintel

Five GCSE retrieval questions · 26 October 2025 · mathsvault.uk/keystones

1. Number

Calculate: 870 + 130

Answer: 870 + 130 = 1000
2. Algebra

Solve: ^x⁄₂ = 4

Answer: x = 8
3. Geometry

Adjacent = 29cm, hypotenuse = 41cm. Find the angle

Answer: 45°
4. Ratio

Simplify: 20:8:20

Answer: 5:2:5
5. Statistics

Find the range of: -10, 6, 43, 16, 19

Answer: 53

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