Keystones — Lintel

Five GCSE retrieval questions · 19 December 2025 · mathsvault.uk/keystones

1. Number

Add: ⁷⁄₈ + ⁶⁄₇

Answer: ⁹⁷⁄₅₆
2. Algebra

Solve: ^x⁄₂ = 17

Answer: x = 34
3. Geometry

Opposite = 8cm, adjacent = 17cm. Calculate the angle

Answer: 25.2°
4. Ratio

Calculate 24.3% of 605

Answer: 147.02
5. Statistics

Calculate the mean of: 11, 50, 9, 32, 39, 22

Answer: 27.2

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