Keystones — Capstone
Five GCSE retrieval questions · 24 July 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
Solve: x⁄2 = 8.5
Answer: x = 17 -
3. Geometry
Find c if a = 20cm and b = 21cm in a right triangle
Answer: 29cm -
4. Ratio
Calculate 28.3% of 413
Answer: 116.88 -
5. Statistics
A spinner has 3 red, 6 blue and 6 green sections. Probability of landing on red?
Answer: 1⁄5