Keystones — Capstone
Five GCSE retrieval questions · 25 November 2025 · mathsvault.uk/keystones
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1. Number
The sum of three consecutive numbers is 111. What are the numbers?
Answer: 36, 37, and 38 -
2. Algebra
Simplify: 11x - 4x + 7y - 4y
Answer: 7x + 3y -
3. Geometry
Adjacent = 12cm, hypotenuse = 29cm. Find the angle
Answer: 65.6° -
4. Ratio
Simplify the ratio 3m:300cm
Answer: 1:100 -
5. Statistics
The mean of 5 numbers is 39. If 4 of them are 42, 28, 30, 39, what is the missing number?
Answer: 56