Keystones — Lintel

Five GCSE retrieval questions · 1 September 2025 · mathsvault.uk/keystones

1. Number

Add: ⁶⁄₈ + ³⁄₇

Answer: ³³⁄₂₈
2. Algebra

Factorise fully: 10x² + 15x

Answer: 5x(2x + 3)
3. Geometry

Opposite = 10cm, adjacent = 15cm. Calculate the angle

Answer: 33.7°
4. Ratio

Find 34% of 469

Answer: 159.46
5. Statistics

Calculate the mean of: 32, 14, 41, 23, 17, 33

Answer: 26.7

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