Keystones — Lintel

Five GCSE retrieval questions · 9 September 2025 · mathsvault.uk/keystones

1. Number

Simplify: 8√3 - 5√3

Answer: 3√3
2. Algebra

Solve: ^x⁄₂ = 6.5

Answer: x = 13
3. Geometry

Opposite = 19cm, adjacent = 14cm. Calculate the angle

Answer: 53.6°
4. Ratio

Calculate 36.4% of 864

Answer: 314.5
5. Statistics

Find the range of: -6, 29, -16, -17, 6

Answer: 46

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