Keystones — Capstone
Five GCSE retrieval questions · 21 August 2026 · mathsvault.uk/keystones
-
1. Number Adding and subtracting surds
Simplify: 12√4 - 4√4
Answer: 8√4 -
2. Algebra Quadratic from a turning point
Find equation with turning point (5, 7) and coefficient 6
Answer: y = 6(x - 5)² + 7 -
3. Geometry Trigonometry — perimeter
Find perimeter: adjacent = 17cm, angle = 32°
Answer: 47.6cm -
4. Ratio One amount as a percentage of another
43 out of 77 students passed. What percentage passed?
Answer: 55.8% -
5. Statistics Simple probability
A spinner has 3 red, 5 blue and 2 green sections. Probability of landing on red?
Answer: 3⁄10