Keystones — Capstone
Five GCSE retrieval questions · 28 December 2025 · mathsvault.uk/keystones
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1. Number
The sum of three consecutive numbers is 90. What are the numbers?
Answer: 29, 30, and 31 -
2. Algebra
Solve: x⁄2 = 17
Answer: x = 34 -
3. Geometry
Adjacent = 17cm, hypotenuse = 22cm. Find the angle
Answer: 39.4° -
4. Ratio
Simplify the ratio 4m:400cm
Answer: 1:100 -
5. Statistics
The mean of 4 numbers is 20. If 3 of them are 29, 40, 28, what is the missing number?
Answer: -17