Keystones — Capstone
Five GCSE retrieval questions · 26 September 2025 · 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
Complete the square: x² + 5x
Answer: (x + 2.5)² - 6.25 -
3. Geometry
Adjacent = 28cm, hypotenuse = 34cm. Find the angle
Answer: 34.6° -
4. Ratio
Simplify the ratio 3m:300cm
Answer: 1:100 -
5. Statistics
The mean of 4 numbers is 35. If 3 of them are 38, 37, 42, what is the missing number?
Answer: 23