Keystones — Capstone
Five GCSE retrieval questions · 10 October 2025 · 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: 16x² + 16x
Answer: 4x(4x + 4) -
3. Geometry
Adjacent = 24cm, hypotenuse = 34cm. Find the angle
Answer: 45.1° -
4. Ratio
Calculate 41.9% of 990
Answer: 414.81 -
5. Statistics
A spinner has 6 red, 6 blue and 3 green sections. Probability of landing on red?
Answer: 2⁄5