Keystones — Lintel

Five GCSE retrieval questions · 17 April 2023 · mathsvault.uk/keystones

1. Number

Add: ¹⁄₅ + ¹⁄₄

Answer: ⁹⁄₂₀
2. Algebra

Factorise fully: 6x² + 10x

Answer: 2x(3x + 5)
3. Geometry

Calculate perimeter: two sides are 10cm and 8cm at right angles

Answer: 30.8cm
4. Ratio

Simplify: 6:10:10

Answer: 3:5:5
5. Statistics

Calculate the mean of: 31, 23, 36, 48, 47, 15

Answer: 33.3

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