Keystones — Capstone
Five GCSE retrieval questions · 5 February 2026 · mathsvault.uk/keystones
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1. Number
Calculate: 4⁄6 + 2⁄5 + 3⁄5
Answer: 5⁄3 -
2. Algebra
Solve: x⁄2 = 14
Answer: x = 28 -
3. Geometry
Adjacent = 27cm, hypotenuse = 42cm. Find the angle
Answer: 50° -
4. Ratio
Simplify the ratio 2m:200cm
Answer: 1:100 -
5. Statistics
The mean of 6 numbers is 25. If 5 of them are 38, 30, 25, 50, 19, what is the missing number?
Answer: -12