Keystones — Capstone
Five GCSE retrieval questions · 3 September 2025 · mathsvault.uk/keystones
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1. Number
Calculate: 1⁄3 + 2⁄3 + 1⁄6
Answer: 7⁄6 -
2. Algebra
Complete the square: x² + 2.2x
Answer: (x + 1.1)² - 1.21 -
3. Geometry
Adjacent = 14cm, hypotenuse = 30cm. Find the angle
Answer: 62.2° -
4. Ratio
Simplify the ratio 5m:500cm
Answer: 1:100 -
5. Statistics
The mean of 6 numbers is 34. If 5 of them are 30, 18, 39, 27, 43, what is the missing number?
Answer: 47