Keystones — Lintel
Five GCSE retrieval questions · 15 February 2026 · mathsvault.uk/keystones
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1. Number
Calculate: 996 + 887
Answer: 1883 -
2. Algebra
Factorise fully: 18x² + 21x
Answer: 3x(6x + 7) -
3. Geometry
Adjacent = 27cm, hypotenuse = 41cm. Find the angle
Answer: 48.8° -
4. Ratio
Simplify: 18:9:6
Answer: 6:3:2 -
5. Statistics
Find the range of: 31, 37, -12, 2, -4
Answer: 49