Keystones — Lintel

Five GCSE retrieval questions · 19 January 2022 · mathsvault.uk/keystones

1. Number

Calculate: ²⁄₃ + ¹⁄₂ + ¹⁄₄

Answer: ¹⁷⁄₁₂
2. Algebra

Factorise: 9x² + 9x

Answer: 9x(x + 1)
3. Geometry

Opposite = 10cm, adjacent = 16cm. Calculate the angle

Answer: 32°
4. Ratio

Simplify: 20:24:16

Answer: 5:6:4
5. Statistics

Calculate the mean of: 35, 7, 11, 20, 24, 25, 19, 44

Answer: 23.1

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