Keystones — Lintel

Five GCSE retrieval questions · 13 October 2025 · mathsvault.uk/keystones

1. Number

What is ∛27?

Answer: 3
2. Algebra

Solve: ^x⁄₈ = 1.625

Answer: x = 13
3. Geometry

Adjacent = 26cm, hypotenuse = 40cm. Find the angle

Answer: 49.5°
4. Ratio

Find 20% of 121

Answer: 24.2
5. Statistics

Calculate the mean of: 37, 6, 47, 6, 6, 19, 43, 11

Answer: 21.9

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