Keystones — Capstone
Five GCSE retrieval questions · 18 May 2026 · mathsvault.uk/keystones
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1. Number
Calculate: 2⁄6 + 1⁄6 + 1⁄6
Answer: 2⁄3 -
2. Algebra
Factorise fully: 20x² + 35x
Answer: 5x(4x + 7) -
3. Geometry
Adjacent = 15cm, hypotenuse = 28cm. Find the angle
Answer: 57.6° -
4. Ratio
Simplify the ratio 5m:500cm
Answer: 1:100 -
5. Statistics
The mean of 6 numbers is 38. If 5 of them are 15, 48, 37, 24, 24, what is the missing number?
Answer: 80