Keystones — Capstone
Five GCSE retrieval questions · 25 February 2026 · mathsvault.uk/keystones
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1. Number
The sum of three consecutive numbers is 102. What are the numbers?
Answer: 33, 34, and 35 -
2. Algebra
Factorise fully: 20x² + 35x
Answer: 5x(4x + 7) -
3. Geometry
Find c if a = 17cm and b = 13cm in a right triangle
Answer: 21.4cm -
4. Ratio
Calculate 25.4% of 880
Answer: 223.52 -
5. Statistics
A spinner has 3 red, 4 blue and 3 green sections. Probability of landing on red?
Answer: 3⁄10