Keystones — Capstone
Five GCSE retrieval questions · 11 October 2025 · mathsvault.uk/keystones
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1. Number
Calculate: 2⁄4 + 4⁄5 + 1⁄2
Answer: 9⁄5 -
2. Algebra
Expand: 5(7x - 6)
Answer: 35x - 30 -
3. Geometry
Adjacent = 24cm, hypotenuse = 41cm. Find the angle
Answer: 54.2° -
4. Ratio
Simplify the ratio 4m:400cm
Answer: 1:100 -
5. Statistics
The mean of 6 numbers is 30. If 5 of them are 21, 36, 22, 28, 18, what is the missing number?
Answer: 55