Keystones — Capstone
Five GCSE retrieval questions · 15 June 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: 28x² + 16x
Answer: 4x(7x + 4) -
3. Geometry
Adjacent = 21cm, hypotenuse = 35cm. Find the angle
Answer: 53.1° -
4. Ratio
Calculate 21.1% of 689
Answer: 145.38 -
5. Statistics
A spinner has 3 red, 2 blue and 5 green sections. Probability of landing on red?
Answer: 3⁄10