Keystones — Capstone
Five GCSE retrieval questions · 4 June 2025 · mathsvault.uk/keystones
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1. Number
Calculate: 1⁄6 + 1⁄6 + 1⁄4
Answer: 7⁄12 -
2. Algebra
Factorise fully: 16x² + 20x
Answer: 4x(4x + 5) -
3. Geometry
Adjacent = 19cm, hypotenuse = 33cm. Find the angle
Answer: 54.8° -
4. Ratio
Simplify the ratio 8m:800cm
Answer: 1:100 -
5. Statistics
The mean of 5 numbers is 23. If 4 of them are 30, 50, 45, 18, what is the missing number?
Answer: -28