Keystones — Capstone
Five GCSE retrieval questions · 13 December 2025 · mathsvault.uk/keystones
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1. Number
The sum of three consecutive numbers is 123. What are the numbers?
Answer: 40, 41, and 42 -
2. Algebra
Find the next term: 1, 4, 10, 19, ...
Answer: 31 -
3. Geometry
Adjacent = 29cm, hypotenuse = 48cm. Find the angle
Answer: 52.8° -
4. Ratio
Calculate 13.1% of 978
Answer: 128.12 -
5. Statistics
The mean of 6 numbers is 36. If 5 of them are 45, 27, 34, 46, 32, what is the missing number?
Answer: 32