Keystones — Capstone
Five GCSE retrieval questions · 30 June 2025 · mathsvault.uk/keystones
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1. Number
The sum of three consecutive numbers is 93. What are the numbers?
Answer: 30, 31, and 32 -
2. Algebra
Factorise fully: 28x² + 20x
Answer: 4x(7x + 5) -
3. Geometry
Adjacent = 16cm, hypotenuse = 22cm. Find the angle
Answer: 43.3° -
4. Ratio
Simplify the ratio 4m:400cm
Answer: 1:100 -
5. Statistics
The mean of 4 numbers is 21. If 3 of them are 36, 21, 17, what is the missing number?
Answer: 10