Keystones — Capstone
Five GCSE retrieval questions · 20 October 2025 · mathsvault.uk/keystones
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1. Number
The sum of three consecutive numbers is 99. What are the numbers?
Answer: 32, 33, and 34 -
2. Algebra
Complete the square: x² + 5.6x
Answer: (x + 2.8)² - 7.84 -
3. Geometry
Adjacent = 24cm, hypotenuse = 39cm. Find the angle
Answer: 52° -
4. Ratio
Simplify the ratio 7m:700cm
Answer: 1:100 -
5. Statistics
A spinner has 4 red, 2 blue and 2 green sections. Probability of landing on red?
Answer: 1⁄2