Keystones — Capstone
Five GCSE retrieval questions · 16 July 2026 · mathsvault.uk/keystones
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1. Number
The sum of three consecutive numbers is 147. What are the numbers?
Answer: 48, 49, and 50 -
2. Algebra
Find the next term: 1, 3, 7, 13, ...
Answer: 21 -
3. Geometry
Adjacent = 25cm, hypotenuse = 31cm. Find the angle
Answer: 36.2° -
4. Ratio
Simplify the ratio 5m:500cm
Answer: 1:100 -
5. Statistics
The mean of 6 numbers is 34. If 5 of them are 28, 33, 39, 38, 33, what is the missing number?
Answer: 33