Keystones — Bedrock

Five GCSE retrieval questions · 21 February 2026 · mathsvault.uk/keystones

1. Number

Calculate: ²⁄₁₁ + ¹⁄₁₁

Answer: ³⁄₁₁
2. Algebra

Find the next term: 9, 19, 29, 39, ...

Answer: 49
3. Geometry

Opposite = 5cm, hypotenuse = 5.8cm. Find the angle

Answer: 60° (approximately)
4. Ratio

Simplify the ratio 25:10

Answer: 5:2
5. Statistics

Find the mean of: 17, 9, 5

Answer: 10.333333333333

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