Keystones — Capstone
Five GCSE retrieval questions · 14 April 2026 · mathsvault.uk/keystones
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1. Number
The sum of three consecutive numbers is 129. What are the numbers?
Answer: 42, 43, and 44 -
2. Algebra
Simplify: 10x - 5x + 8y - 6y
Answer: 5x + 2y -
3. Geometry
Adjacent = 26cm, hypotenuse = 34cm. Find the angle
Answer: 40.1° -
4. Ratio
Calculate 43.7% of 388
Answer: 169.56 -
5. Statistics
The mean of 4 numbers is 23. If 3 of them are 41, 44, 43, what is the missing number?
Answer: -36