Keystones — Lintel

Five GCSE retrieval questions · 28 March 2025 · mathsvault.uk/keystones

1. Number

57000

Answer: 5.7 × 10⁴
2. Algebra

Factorise: 5x² + 9x

Answer: x(5x + 9)
3. Geometry

Opposite = 13cm, adjacent = 17cm. Calculate the angle

Answer: 37.4°
4. Ratio

Simplify the ratio 6m:600cm

Answer: 1:100
5. Statistics

Calculate the mean of: 18, 36, 48, 7, 13, 19, 20, 12

Answer: 21.6

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