Keystones — Lintel

Five GCSE retrieval questions · 23 July 2026 · mathsvault.uk/keystones

1. Number

Calculate: 999 + 881

Answer: 1880
2. Algebra

Solve: ^x⁄₈ = 4.875

Answer: x = 39
3. Geometry

A circle has area 380.cm². Find its radius (dp)

Answer: 11cm
4. Ratio

Simplify: 24:12:12

Answer: 2:1:1
5. Statistics

A spinner has 5 red, 6 blue and 6 green sections. Probability of landing on red?

Answer: ⁵⁄₁₇

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