Keystones — Lintel

Five GCSE retrieval questions · 27 January 2026 · mathsvault.uk/keystones

1. Number

Calculate: 994 + 672

Answer: 1666
2. Algebra

Solve: ^x⁄₈ = 4.875

Answer: x = 39
3. Geometry

Calculate the area of a circle with diameter 18cm

Answer: 254.47cm²
4. Ratio

Find 18% of 146

Answer: 26.28
5. Statistics

Find the range of: 14, 27, -15, -6, -18

Answer: 45

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