Keystones — Lintel
Five GCSE retrieval questions · 27 December 2025 · mathsvault.uk/keystones
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1. Number
Calculate: 994 + 666
Answer: 1660 -
2. Algebra
Factorise fully: 15x² + 30x
Answer: 5x(3x + 6) -
3. Geometry
Adjacent = 22cm, hypotenuse = 41cm. Find the angle
Answer: 57.5° -
4. Ratio
Simplify: 4:8:10
Answer: 2:4:5 -
5. Statistics
Calculate the mean of: 35, 47, 43, 39, 43, 5, 24
Answer: 33.7