Keystones — Capstone
Five GCSE retrieval questions · 12 May 2025 · mathsvault.uk/keystones
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1. Number
The sum of three consecutive numbers is 120. What are the numbers?
Answer: 39, 40, and 41 -
2. Algebra
Factorise fully: 16x² + 16x
Answer: 4x(4x + 4) -
3. Geometry
Find c if a = 9cm and b = 19cm in a right triangle
Answer: 21cm -
4. Ratio
Simplify the ratio 4m:400cm
Answer: 1:100 -
5. Statistics
A spinner has 2 red, 6 blue and 4 green sections. Probability of landing on red?
Answer: 1⁄6