Keystones — Capstone
Five GCSE retrieval questions · 1 July 2026 · mathsvault.uk/keystones
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1. Number Adding and subtracting surds
Simplify: 6√4 - 2√4
Answer: 4√4 -
2. Algebra Quadratic from a turning point
Find equation with turning point (3, 7) and coefficient 2
Answer: y = 2(x - 3)² + 7 -
3. Geometry Trigonometry — perimeter
Find perimeter: adjacent = 24cm, angle = 32°
Answer: 67.3cm -
4. Ratio One amount as a percentage of another
40 out of 81 students passed. What percentage passed?
Answer: 49.4% -
5. Statistics Simple probability
A spinner has 6 red, 6 blue and 5 green sections. Probability of landing on red?
Answer: 6⁄17