Keystones — Lintel

Five GCSE retrieval questions · 20 August 2025 · mathsvault.uk/keystones

1. Number

Calculate: 646 + 146

Answer: 646 + 146 = 792
2. Algebra

Solve: ^x⁄₅ = 6.8

Answer: x = 34
3. Geometry

Adjacent = 22cm, hypotenuse = 33cm. Find the angle

Answer: 48.2°
4. Ratio

Calculate 26% of 863

Answer: 224.38
5. Statistics

Calculate the mean of: 6, 14, 34, 50, 33, 50

Answer: 31.2

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