Keystones — Cornerstone
Five GCSE retrieval questions · 25 February 2026 · mathsvault.uk/keystones
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1. Number Directed number mixed operations
Calculate: 2 + 8 - 10
Answer: 0 -
2. Algebra Linear nth term
Find the nth term rule for: 11, 13, 15, 17, ...
Answer: 2n + 9 -
3. Geometry Area of a circle
Find the area of a circle with radius 4cm
Answer: 50.27cm² -
4. Ratio Percentage change
A price falls from £412.00 to £111.00. Calculate the percentage decrease
Answer: 73.1% -
5. Statistics Median
Find the median of: 18, 14, 18, 12, 7
Answer: 14