Keystones — Capstone
Five GCSE retrieval questions · 12 June 2026 · mathsvault.uk/keystones
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1. Number
The sum of three consecutive numbers is 141. What are the numbers?
Answer: 46, 47, and 48 -
2. Algebra
Solve: x⁄8 = 3.75
Answer: x = 30 -
3. Geometry
Adjacent = 13cm, hypotenuse = 21cm. Find the angle
Answer: 51.8° -
4. Ratio
Calculate 37.9% of 806
Answer: 305.47 -
5. Statistics
The mean of 5 numbers is 26. If 4 of them are 42, 39, 43, 49, what is the missing number?
Answer: -43