Keystones — Lintel
Five GCSE retrieval questions · 31 October 2025 · mathsvault.uk/keystones
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1. Number
Calculate: 995 + 765
Answer: 1760 -
2. Algebra
Solve: 9x = 117
Answer: x = 13 -
3. Geometry
Adjacent = 20cm, hypotenuse = 28cm. Find the angle
Answer: 44.4° -
4. Ratio
Simplify: 12:24:20
Answer: 3:6:5 -
5. Statistics
Calculate the mean of: 39, 44, 15, 46, 38, 36
Answer: 36.3