Keystones — Capstone
Five GCSE retrieval questions · 14 September 2025 · mathsvault.uk/keystones
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1. Number
The sum of three consecutive numbers is 129. What are the numbers?
Answer: 42, 43, and 44 -
2. Algebra
Solve: x⁄2 = 16
Answer: x = 32 -
3. Geometry
Adjacent = 13cm, hypotenuse = 24cm. Find the angle
Answer: 57.2° -
4. Ratio
Simplify the ratio 8m:800cm
Answer: 1:100 -
5. Statistics
The mean of 6 numbers is 28. If 5 of them are 30, 22, 21, 39, 23, what is the missing number?
Answer: 33