Keystones — Cornerstone
Five GCSE retrieval questions · 25 July 2026 · mathsvault.uk/keystones
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1. Number Directed number mixed operations
Calculate: -2 × -1 + 9
Answer: 11 -
2. Algebra Linear nth term
Find the nth term: 38, 36, 34, 32, ...
Answer: 40 - 2n -
3. Geometry Area of a circle
Calculate the area of a circle with diameter 23cm
Answer: 415.48cm² -
4. Ratio Percentage change
A price falls from £349.00 to £234.00. Calculate the percentage decrease
Answer: 33% -
5. Statistics Median
Calculate the median of: 16, 21, 32, 19, 40, 34
Answer: 26.5