Keystones — Lintel

Five GCSE retrieval questions · 18 May 2025 · mathsvault.uk/keystones

1. Number

Calculate: 997 + 725

Answer: 1722
2. Algebra

Solve: ^x⁄₅ = 7.6

Answer: x = 38
3. Geometry

Calculate the area of a circle with diameter 17cm

Answer: 226.98cm²
4. Ratio

Simplify the ratio 6m:600cm

Answer: 1:100
5. Statistics

Calculate the mean of: 5, 12, 23, 20, 36, 34, 15

Answer: 20.7

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