Keystones — Cornerstone

Five GCSE retrieval questions · 28 May 2026 · mathsvault.uk/keystones

1. Number

Add: ⁴⁄₅ + ¹⁄₄

Answer: ²¹⁄₂₀
2. Algebra

Collect like terms: 4x + 7y + 6x + 4y

Answer: 10x + 11y
3. Geometry

Opposite = 12cm, adjacent = 11cm. Calculate the angle

Answer: 47.5°
4. Ratio

Simplify the ratio 16:28

Answer: 4:7
5. Statistics

Find the mean of: 6, 7, 2, 10, 19

Answer: 8.8

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