Keystones — Capstone
Five GCSE retrieval questions · 16 May 2026 · mathsvault.uk/keystones
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1. Number Adding and subtracting surds
Simplify: 12√4 - 5√4
Answer: 7√4 -
2. Algebra Quadratic from a turning point
Find equation with turning point (4, 2) and coefficient 3
Answer: y = 3(x - 4)² + 2 -
3. Geometry Trigonometry — perimeter
Find perimeter: adjacent = 18cm, angle = 42°
Answer: 58.4cm -
4. Ratio One amount as a percentage of another
41 out of 76 students passed. What percentage passed?
Answer: 53.9% -
5. Statistics Simple probability
A spinner has 5 red, 3 blue and 6 green sections. Probability of landing on red?
Answer: 5⁄14