Keystones — Capstone
Five GCSE retrieval questions · 19 August 2026 · mathsvault.uk/keystones
-
1. Number Adding and subtracting surds
Simplify: 11√4 - 10√4
Answer: 1√4 -
2. Algebra Quadratic from a turning point
Find equation with turning point (1, 7) and coefficient 4
Answer: y = 4(x - 1)² + 7 -
3. Geometry Trigonometry — perimeter
Find perimeter: adjacent = 14cm, angle = 43°
Answer: 46.2cm -
4. Ratio One amount as a percentage of another
40 out of 96 students passed. What percentage passed?
Answer: 41.7% -
5. Statistics Simple probability
A spinner has 3 red, 3 blue and 3 green sections. Probability of landing on red?
Answer: 1⁄3