Keystones — Capstone
Five GCSE retrieval questions · 22 March 2025 · mathsvault.uk/keystones
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1. Number
The sum of three consecutive numbers is 120. What are the numbers?
Answer: 39, 40, and 41 -
2. Algebra
Factorise fully: 6x² + 21x
Answer: 3x(2x + 7) -
3. Geometry
Adjacent = 28cm, hypotenuse = 47cm. Find the angle
Answer: 53.4° -
4. Ratio
Simplify the ratio 4m:400cm
Answer: 1:100 -
5. Statistics
The mean of 6 numbers is 31. If 5 of them are 32, 17, 33, 31, 36, what is the missing number?
Answer: 37