Keystones — Cornerstone
Five GCSE retrieval questions · 30 October 2026 · mathsvault.uk/keystones
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1. Number Directed number mixed operations
Calculate: -7 + -9 - -2
Answer: -14 -
2. Algebra Linear nth term
Find the nth term: 15, 11, 7, 3, ...
Answer: 19 - 4n -
3. Geometry Area of a circle
Find the area of a circle with radius 6cm
Answer: 113.cm² -
4. Ratio Percentage change
A price falls from £159.00 to £113.00. Calculate the percentage decrease
Answer: 28.9% -
5. Statistics Median
Find the median of: 6, 5, 14, 10, 20
Answer: 10