Keystones — Bedrock

Five GCSE retrieval questions · 1 February 2026 · mathsvault.uk/keystones

1. Number

Calculate: ¹⁄₁₁ + ³⁄₁₁

Answer: ⁴⁄₁₁
2. Algebra

Expand: 9(x + 3)

Answer: 9x + 27
3. Geometry

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

Answer: 45° (approximately)
4. Ratio

Simplify the ratio 24:18

Answer: 4:3
5. Statistics

What is the probability of getting heads when flipping a fair coin?

Answer: ¹⁄₂

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