Keystones — Capstone
Five GCSE retrieval questions · 9 March 2026 · mathsvault.uk/keystones
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1. Number
The sum of three consecutive numbers is 105. What are the numbers?
Answer: 34, 35, and 36 -
2. Algebra
Simplify: 5x - 2x + 3y - 2y
Answer: 3x + y -
3. Geometry
Adjacent = 16cm, hypotenuse = 21cm. Find the angle
Answer: 40.4° -
4. Ratio
Calculate 24.2% of 257
Answer: 62.19 -
5. Statistics
The mean of 6 numbers is 39. If 5 of them are 34, 19, 34, 22, 33, what is the missing number?
Answer: 92