Keystones — Lintel

Five GCSE retrieval questions · 23 May 2022 · mathsvault.uk/keystones

1. Number

Add: ²⁄₆ + ³⁄₄

Answer: ¹³⁄₁₂
2. Algebra

Factorise fully: 6x² + 9x

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

Find c if a = 20cm and b = 20cm in a right triangle

Answer: 28.3cm
4. Ratio

Simplify the ratio 3m:300cm

Answer: 1:100
5. Statistics

Calculate the mean of: 42, 45, 34, 44, 47, 47, 7, 19

Answer: 35.6

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