Keystones — Lintel

Five GCSE retrieval questions · 28 April 2025 · mathsvault.uk/keystones

1. Number

Calculate: ¹⁄₄ + ¹⁄₄ + ⁵⁄₆

Answer: ⁴⁄₃
2. Algebra

Factorise fully: 6x² + 18x

Answer: 3x(2x + 6)
3. Geometry

Calculate perimeter: two sides are 13cm and 6cm at right angles

Answer: 33.3cm
4. Ratio

Calculate 11.5% of 482

Answer: 55.43
5. Statistics

Find the range of: 40, 28, 16, -15, 20

Answer: 55

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