Keystones — Capstone
Five GCSE retrieval questions · 21 February 2026 · mathsvault.uk/keystones
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1. Number
The sum of three consecutive numbers is 120. What are the numbers?
Answer: 39, 40, and 41 -
2. Algebra
Solve: x⁄7 = 2.7142857142857
Answer: x = 19 -
3. Geometry
Adjacent = 14cm, hypotenuse = 24cm. Find the angle
Answer: 54.3° -
4. Ratio
Simplify the ratio 6m:600cm
Answer: 1:100 -
5. Statistics
The mean of 4 numbers is 40. If 3 of them are 41, 28, 36, what is the missing number?
Answer: 55