Keystones — Lintel

Five GCSE retrieval questions · 7 August 2026 · mathsvault.uk/keystones

1. Number

Simplify: x³ × x³

Answer: x⁶
2. Algebra

Solve: ^x⁄₆ = 3

Answer: x = 18
3. Geometry

Calculate the hypotenuse when a = 9cm and b = 13cm

Answer: 15.81cm
4. Ratio

Calculate 30.9% of 776

Answer: 239.78
5. Statistics

Find the range of: -25, 38, 19, 26, -11

Answer: 63

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