Keystones — Capstone
Five GCSE retrieval questions · 23 September 2025 · mathsvault.uk/keystones
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1. Number
The sum of three consecutive numbers is 102. What are the numbers?
Answer: 33, 34, and 35 -
2. Algebra
Factorise fully: 28x² + 12x
Answer: 4x(7x + 3) -
3. Geometry
Adjacent = 25cm, hypotenuse = 44cm. Find the angle
Answer: 55.4° -
4. Ratio
Simplify the ratio 7m:700cm
Answer: 1:100 -
5. Statistics
The mean of 5 numbers is 35. If 4 of them are 27, 36, 38, 27, what is the missing number?
Answer: 47