Keystones — Capstone
Five GCSE retrieval questions · 1 February 2026 · mathsvault.uk/keystones
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1. Number
The sum of three consecutive numbers is 150. What are the numbers?
Answer: 49, 50, and 51 -
2. Algebra
Solve: x⁄3 = 8.6666666666667
Answer: x = 26 -
3. Geometry
Adjacent = 13cm, hypotenuse = 27cm. Find the angle
Answer: 61.2° -
4. Ratio
Simplify the ratio 5m:500cm
Answer: 1:100 -
5. Statistics
The mean of 4 numbers is 29. If 3 of them are 36, 50, 19, what is the missing number?
Answer: 11