Keystones — Cornerstone

Five GCSE retrieval questions · 11 January 2026 · mathsvault.uk/keystones

1. Number

Add: ⁵⁄₇ + ²⁄₃

Answer: ²⁹⁄₂₁
2. Algebra

Solve: x + 8 = 13

Answer: x = 5
3. Geometry

Opposite = 13cm, adjacent = 18cm. Calculate the angle

Answer: 35.8°
4. Ratio

Find 15% of 256

Answer: 38.4
5. Statistics

Find the range of: 18, 8, 23, 18, 17

Answer: 15

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