Keystones — Capstone
Five GCSE retrieval questions · 14 May 2026 · mathsvault.uk/keystones
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1. Number Adding and subtracting surds
Simplify: 7√2 - 2√2
Answer: 5√2 -
2. Algebra Quadratic from a turning point
Find equation with turning point (2, 10) and coefficient 3
Answer: y = 3(x - 2)² + 10 -
3. Geometry Trigonometry — perimeter
Find perimeter: adjacent = 14cm, angle = 47°
Answer: 49.5cm -
4. Ratio One amount as a percentage of another
44 out of 81 students passed. What percentage passed?
Answer: 54.3% -
5. Statistics Simple probability
A spinner has 6 red, 6 blue and 3 green sections. Probability of landing on red?
Answer: 2⁄5