Keystones — Lintel

Five GCSE retrieval questions · 25 February 2025 · mathsvault.uk/keystones

1. Number

Add: ³⁄₆ + ²⁄₅

Answer: ⁹⁄₁₀
2. Algebra

Factorise: 8x² + 3x

Answer: x(8x + 3)
3. Geometry

Opposite = 17cm, adjacent = 19cm. Calculate the angle

Answer: 41.8°
4. Ratio

Simplify: 18:9:12

Answer: 6:3:4
5. Statistics

Find the range of: 18, -24, 15, -17, 47

Answer: 71

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