Keystones — Capstone
Five GCSE retrieval questions · 7 October 2025 · mathsvault.uk/keystones
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1. Number
The sum of three consecutive numbers is 138. What are the numbers?
Answer: 45, 46, and 47 -
2. Algebra
Solve: x⁄8 = 2.875
Answer: x = 23 -
3. Geometry
Adjacent = 12cm, hypotenuse = 19cm. Find the angle
Answer: 50.8° -
4. Ratio
Calculate 11% of 252
Answer: 27.72 -
5. Statistics
The mean of 6 numbers is 40. If 5 of them are 24, 46, 50, 19, 27, what is the missing number?
Answer: 74