Keystones — Capstone
Five GCSE retrieval questions · 30 July 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
Find the next term: 1, 4, 10, 19, ...
Answer: 31 -
3. Geometry
Adjacent = 29cm, hypotenuse = 36cm. Find the angle
Answer: 36.3° -
4. Ratio
Simplify the ratio 6m:600cm
Answer: 1:100 -
5. Statistics
The mean of 4 numbers is 20. If 3 of them are 18, 38, 24, what is the missing number?
Answer: 0