Keystones — Capstone
Five GCSE retrieval questions · 22 July 2026 · mathsvault.uk/keystones
-
1. Number
The sum of three consecutive numbers is 126. What are the numbers?
Answer: 41, 42, and 43 -
2. Algebra
Factorise fully: 25x² + 10x
Answer: 5x(5x + 2) -
3. Geometry
Adjacent = 16cm, hypotenuse = 22cm. Find the angle
Answer: 43.3° -
4. Ratio
Simplify the ratio 6m:600cm
Answer: 1:100 -
5. Statistics
The mean of 4 numbers is 20. If 3 of them are 48, 35, 17, what is the missing number?
Answer: -20