Keystones — Bedrock

Five GCSE retrieval questions · 29 July 2025 · mathsvault.uk/keystones

1. Number

300000

Answer: 3 × 10⁵
2. Algebra

Find the next term: 9, 15, 21, 27, ...

Answer: 33
3. Geometry

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

Answer: 45° (approximately)
4. Ratio

Simplify the ratio 6:12

Answer: 1:2
5. Statistics

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

Answer: ¹⁄₂

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