Keystones — Capstone
Five GCSE retrieval questions · 27 March 2026 · mathsvault.uk/keystones
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1. Number Adding and subtracting surds
Simplify: 6√2 - 3√2
Answer: 3√2 -
2. Algebra Quadratic from a turning point
Find equation with turning point (4, 5) and coefficient 2
Answer: y = 2(x - 4)² + 5 -
3. Geometry Trigonometry — perimeter
Find perimeter: adjacent = 11cm, angle = 60°
Answer: 52.cm -
4. Ratio One amount as a percentage of another
47 out of 100 students passed. What percentage passed?
Answer: 47% -
5. Statistics Simple probability
A spinner has 6 red, 2 blue and 4 green sections. Probability of landing on red?
Answer: 1⁄2