Keystones — Lintel

Five GCSE retrieval questions · 24 July 2025 · mathsvault.uk/keystones

1. Number

Calculate: 889 + 928

Answer: 889 + 928 = 1817
2. Algebra

Solve: ^x⁄₅ = 2.2

Answer: x = 11
3. Geometry

Calculate the area of a circle with diameter 20cm

Answer: 314.16cm²
4. Ratio

Simplify: 9:15:18

Answer: 3:5:6
5. Statistics

Find the range of: 40, 11, 24, -14, 11

Answer: 54

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