Keystones — Bedrock

Five GCSE retrieval questions · 26 February 2026 · mathsvault.uk/keystones

1. Number

Calculate: 27 + 10

Answer: 27 + 10 = 37
2. Algebra

Solve: x + 4 = 9

Answer: x = 5
3. Geometry

Opposite = 12cm, hypotenuse = 17cm. Find the angle

Answer: 45° (approximately)
4. Ratio

Simplify the ratio 20:12

Answer: 5:3
5. Statistics

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

Answer: ¹⁄₂

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