Keystones — Bedrock

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

1. Number

4000

Answer: 4 × 10³
2. Algebra

Solve: x + 7 = 14

Answer: x = 7
3. Geometry

Opposite = 10cm, hypotenuse = 11.5cm. Find the angle

Answer: 60° (approximately)
4. Ratio

Simplify the ratio 10:30

Answer: 1:3
5. Statistics

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

Answer: ¹⁄₂

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