Keystones — Capstone
Five GCSE retrieval questions · 13 May 2026 · mathsvault.uk/keystones
-
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, 3) and coefficient 2
Answer: y = 2(x - 4)² + 3 -
3. Geometry Trigonometry — perimeter
Find perimeter: adjacent = 15cm, angle = 58°
Answer: 67.3cm -
4. Ratio One amount as a percentage of another
53 out of 95 students passed. What percentage passed?
Answer: 55.8% -
5. Statistics Simple probability
A spinner has 2 red, 6 blue and 3 green sections. Probability of landing on red?
Answer: 2⁄11