Keystones — Capstone
Five GCSE retrieval questions · 20 January 2026 · mathsvault.uk/keystones
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1. Number
The sum of three consecutive numbers is 141. What are the numbers?
Answer: 46, 47, and 48 -
2. Algebra
Expand: 8(2x - 12)
Answer: 16x - 96 -
3. Geometry
Adjacent = 27cm, hypotenuse = 33cm. Find the angle
Answer: 35.1° -
4. Ratio
Simplify the ratio 2m:200cm
Answer: 1:100 -
5. Statistics
The mean of 6 numbers is 25. If 5 of them are 24, 37, 33, 19, 25, what is the missing number?
Answer: 12