Keystones — Capstone
Five GCSE retrieval questions · 30 December 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
Simplify: 12x - 3x + 8y - 5y
Answer: 9x + 3y -
3. Geometry
Find c if a = 20cm and b = 22cm in a right triangle
Answer: 29.7cm -
4. Ratio
Calculate 41% of 984
Answer: 403.44 -
5. Statistics
A spinner has 3 red, 6 blue and 4 green sections. Probability of landing on red?
Answer: 3⁄13