Keystones — Capstone
Five GCSE retrieval questions · 15 May 2026 · mathsvault.uk/keystones
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1. Number Adding and subtracting surds
Simplify: 6√3 - 4√3
Answer: 2√3 -
2. Algebra Quadratic from a turning point
Find equation with turning point (3, 5) and coefficient 2
Answer: y = 2(x - 3)² + 5 -
3. Geometry Trigonometry — perimeter
Find perimeter: adjacent = 11cm, angle = 39°
Answer: 34.cm -
4. Ratio One amount as a percentage of another
55 out of 71 students passed. What percentage passed?
Answer: 77.5% -
5. Statistics Simple probability
A spinner has 5 red, 6 blue and 4 green sections. Probability of landing on red?
Answer: 1⁄3