Keystones — Lintel

Five GCSE retrieval questions · 6 July 2023 · mathsvault.uk/keystones

1. Number

11000

Answer: 1.1 × 10⁴
2. Algebra

Factorise fully: 9x² + 15x

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

Opposite = 19cm, adjacent = 16cm. Calculate the angle

Answer: 49.9°
4. Ratio

Find 72% of 497

Answer: 357.84
5. Statistics

A spinner has 5 red, 6 blue and 3 green sections. Probability of landing on red?

Answer: ⁵⁄₁₄

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