Keystones — Capstone
Five GCSE retrieval questions · 3 December 2025 · mathsvault.uk/keystones
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1. Number
The sum of three consecutive numbers is 111. What are the numbers?
Answer: 36, 37, and 38 -
2. Algebra
Solve: x⁄2 = 8.5
Answer: x = 17 -
3. Geometry
Adjacent = 17cm, hypotenuse = 35cm. Find the angle
Answer: 60.9° -
4. Ratio
Simplify the ratio 5m:500cm
Answer: 1:100 -
5. Statistics
The mean of 6 numbers is 21. If 5 of them are 23, 38, 21, 38, 42, what is the missing number?
Answer: -36