Keystones — Capstone
Five GCSE retrieval questions · 23 April 2026 · mathsvault.uk/keystones
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1. Number
The sum of three consecutive numbers is 138. What are the numbers?
Answer: 45, 46, and 47 -
2. Algebra
Factorise fully: 25x² + 35x
Answer: 5x(5x + 7) -
3. Geometry
Find c if a = 14cm and b = 22cm in a right triangle
Answer: 26.cm -
4. Ratio
Simplify the ratio 5m:500cm
Answer: 1:100 -
5. Statistics
A spinner has 4 red, 6 blue and 2 green sections. Probability of landing on red?
Answer: 1⁄3