Keystones — Lintel

Five GCSE retrieval questions · 4 August 2026 · mathsvault.uk/keystones

1. Number

Calculate: 990 + 742

Answer: 1732
2. Algebra

Solve: ^x⁄₈ = 1.25

Answer: x = 10
3. Geometry

A right triangle has hypotenuse 17cm and one side 8cm. Find its area

Answer: 60cm²
4. Ratio

Calculate 43.1% of 544

Answer: 234.46
5. Statistics

Find the range of: -30, 4, 48, -7, -16

Answer: 78

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