Keystones — Capstone
Five GCSE retrieval questions · 30 October 2025 · 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
Simplify: 8x - 7x + 6y - y
Answer: x + 5y -
3. Geometry
Adjacent = 23cm, hypotenuse = 29cm. Find the angle
Answer: 37.5° -
4. Ratio
Simplify the ratio 4m:400cm
Answer: 1:100 -
5. Statistics
The mean of 6 numbers is 24. If 5 of them are 22, 25, 48, 18, 22, what is the missing number?
Answer: 9