Keystones — Capstone
Five GCSE retrieval questions · 14 March 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
Factorise fully: 12x² + 24x
Answer: 4x(3x + 6) -
3. Geometry
Adjacent = 30cm, hypotenuse = 50cm. Find the angle
Answer: 53.1° -
4. Ratio
Calculate 23.9% of 991
Answer: 236.85 -
5. Statistics
The mean of 5 numbers is 26. If 4 of them are 32, 25, 33, 31, what is the missing number?
Answer: 9