Keystones — Lintel
Five GCSE retrieval questions · 28 May 2026 · mathsvault.uk/keystones
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1. Number
What is the missing number: 49 + ? = 114
Answer: 65 -
2. Algebra
Solve: 9x = 90
Answer: x = 10 -
3. Geometry
Adjacent = 27cm, hypotenuse = 45cm. Find the angle
Answer: 53.1° -
4. Ratio
Simplify the ratio 6m:600cm
Answer: 1:100 -
5. Statistics
Calculate the mean of: 23, 10, 12, 26, 28, 50
Answer: 24.8