Keystones — Cornerstone

Five GCSE retrieval questions · 7 November 2024 · mathsvault.uk/keystones

1. Number

80000

Answer: 8 × 10⁴
2. Algebra

Factorise: 30x + 40

Answer: 5(6x + 8)
3. Geometry

Find the area of a right triangle with base 7cm and height 10cm

Answer: 35cm²
4. Ratio

Simplify the ratio 20:40

Answer: 1:2
5. Statistics

Calculate the mean of: 35, 19, 36, 8, 25, 38, 33

Answer: 27.7

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