Keystones — Capstone
Five GCSE retrieval questions · 2 July 2026 · mathsvault.uk/keystones
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1. Number Adding and subtracting surds
Simplify: 11√3 - 7√3
Answer: 4√3 -
2. Algebra Quadratic from a turning point
Find equation with turning point (4, 3) and coefficient 6
Answer: y = 6(x - 4)² + 3 -
3. Geometry Trigonometry — perimeter
Find perimeter: adjacent = 17cm, angle = 44°
Answer: 57cm -
4. Ratio One amount as a percentage of another
50 out of 85 students passed. What percentage passed?
Answer: 58.8% -
5. Statistics Simple probability
A spinner has 4 red, 4 blue and 2 green sections. Probability of landing on red?
Answer: 2⁄5