Keystones — Capstone
Five GCSE retrieval questions · 8 December 2025 · mathsvault.uk/keystones
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1. Number
The sum of three consecutive numbers is 114. What are the numbers?
Answer: 37, 38, and 39 -
2. Algebra
Complete the square: x² + 4x
Answer: (x + 2)² - 4 -
3. Geometry
Adjacent = 21cm, hypotenuse = 40cm. Find the angle
Answer: 58.3° -
4. Ratio
Simplify the ratio 7m:700cm
Answer: 1:100 -
5. Statistics
A spinner has 4 red, 3 blue and 4 green sections. Probability of landing on red?
Answer: 4⁄11