Keystones — Capstone
Five GCSE retrieval questions · 23 March 2026 · mathsvault.uk/keystones
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1. Number
The sum of three consecutive numbers is 90. What are the numbers?
Answer: 29, 30, and 31 -
2. Algebra
Solve: x⁄4 = 9.5
Answer: x = 38 -
3. Geometry
Find c if a = 20cm and b = 23cm in a right triangle
Answer: 30.5cm -
4. Ratio
Simplify the ratio 8m:800cm
Answer: 1:100 -
5. Statistics
A spinner has 3 red, 4 blue and 5 green sections. Probability of landing on red?
Answer: 1⁄4