Keystones — Cornerstone
Five GCSE retrieval questions · 3 July 2026 · mathsvault.uk/keystones
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1. Number Highest common factor
Find the HCF of 24 and 8
Answer: 4 -
2. Algebra Substitution
If x = 4, calculate x² + 6x + 8
Answer: 48 -
3. Geometry Circumference of a circle
Calculate the circumference of a circle with radius 8cm
Answer: 50.27cm -
4. Ratio Percentage multipliers
What multiplier represents a 20% increase?
Answer: 1.2 -
5. Statistics Averages and range
Find the mean, mode, median and range of: 32, 36, 32, 44, 16
Answer: Mean = 32, Mode = 32, Median = 32, Range = 28