Keystones — Bedrock

Five GCSE retrieval questions · 1 September 2025 · mathsvault.uk/keystones

1. Number

Calculate: 30 + 28

Answer: 30 + 28 = 58
2. Algebra

Simplify: 3x + 6x

Answer: 9x
3. Geometry

Opposite = 11cm, hypotenuse = 15.6cm. Find the angle

Answer: 45° (approximately)
4. Ratio

Simplify the ratio 15:18

Answer: 5:6
5. Statistics

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

Answer: ¹⁄₂

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