Keystones — Bedrock

Five GCSE retrieval questions · 15 December 2025 · mathsvault.uk/keystones

1. Number

Calculate: ⁴⁄₁₁ + ³⁄₁₁

Answer: ⁷⁄₁₁
2. Algebra

Find the next term: 23, 31, 39, 47, ...

Answer: 55
3. Geometry

Opposite = 13cm, hypotenuse = 18.4cm. Find the angle

Answer: 45° (approximately)
4. Ratio

Simplify the ratio 15:9

Answer: 5:3
5. Statistics

Find the mean of: 16, 8, 18, 17

Answer: 14.75

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