Keystones — Capstone
Five GCSE retrieval questions · 24 April 2026 · mathsvault.uk/keystones
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1. Number
The sum of three consecutive numbers is 141. What are the numbers?
Answer: 46, 47, and 48 -
2. Algebra
Factorise fully: 4x² + 6x
Answer: 2x(2x + 3) -
3. Geometry
Adjacent = 15cm, hypotenuse = 25cm. Find the angle
Answer: 53.1° -
4. Ratio
Simplify the ratio 6m:600cm
Answer: 1:100 -
5. Statistics
The mean of 5 numbers is 35. If 4 of them are 29, 34, 15, 19, what is the missing number?
Answer: 78