Keystones — Lintel

Five GCSE retrieval questions · 30 November 2022 · mathsvault.uk/keystones

1. Number

1800000

Answer: 1.8 × 10⁶
2. Algebra

Factorise fully: 4x² + 6x

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

Calculate perimeter: two sides are 11cm and 9cm at right angles

Answer: 34.2cm
4. Ratio

Simplify the ratio 2m:200cm

Answer: 1:100
5. Statistics

A spinner has 2 red, 3 blue and 5 green sections. Probability of landing on red?

Answer: ¹⁄₅

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