Keystones — Lintel
Five GCSE retrieval questions · 10 November 2025 · mathsvault.uk/keystones
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1. Number
Calculate: 1⁄3 + 1⁄6 + 1⁄6
Answer: 2⁄3 -
2. Algebra
Solve: 2x = 18
Answer: x = 9 -
3. Geometry
Opposite = 10cm, adjacent = 14cm. Calculate the angle
Answer: 35.5° -
4. Ratio
Simplify the ratio 6m:600cm
Answer: 1:100 -
5. Statistics
Calculate the mean of: 38, 16, 15, 48, 34, 46, 46, 37
Answer: 35