Keystones — Capstone
Five GCSE retrieval questions · 11 June 2026 · mathsvault.uk/keystones
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1. Number
The sum of three consecutive numbers is 150. What are the numbers?
Answer: 49, 50, and 51 -
2. Algebra
Factorise fully: 25x² + 30x
Answer: 5x(5x + 6) -
3. Geometry
Adjacent = 29cm, hypotenuse = 41cm. Find the angle
Answer: 45° -
4. Ratio
Simplify the ratio 2m:200cm
Answer: 1:100 -
5. Statistics
The mean of 6 numbers is 39. If 5 of them are 34, 48, 31, 40, 34, what is the missing number?
Answer: 47