Keystones — Cornerstone
Five GCSE retrieval questions · 22 August 2026 · mathsvault.uk/keystones
-
1. Number Highest common factor
What is the HCF of 12 and 18?
Answer: 6 -
2. Algebra Substitution
If x = 3, find the value of 4x + 11
Answer: 23 -
3. Geometry Circumference of a circle
Find the circumference of a circle with diameter 17cm
Answer: 53.41cm -
4. Ratio Percentage multipliers
What multiplier represents a 10% increase?
Answer: 1.1 -
5. Statistics Averages and range
Find the mean, mode, median and range of: 40, 47, 40, 31, 25
Answer: Mean = 36.6, Mode = 40, Median = 40, Range = 22