Keystones — Cornerstone

Five GCSE retrieval questions · 19 July 2025 · mathsvault.uk/keystones

1. Number

Add: ³⁄₇ + ²⁄₃

Answer: ²³⁄₂₁
2. Algebra

Find the next term: 24, 26, 28, 30, ...

Answer: 32
3. Geometry

Opposite = 6cm, hypotenuse = 12cm. Find the angle

Answer: 30° (approximately)
4. Ratio

Simplify the ratio 25:40

Answer: 5:8
5. Statistics

Calculate the range of: 39, 48, 51, 36, 82, 89

Answer: 53

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