Keystones — Cornerstone
Five GCSE retrieval questions · 28 October 2026 · mathsvault.uk/keystones
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1. Number Directed number mixed operations
Calculate: -8 × -4 + -7
Answer: 25 -
2. Algebra Linear nth term
Find the nth term rule for: 8, 10, 12, 14, ...
Answer: 2n + 6 -
3. Geometry Area of a circle
Find the area of a circle with radius 7cm
Answer: 153.94cm² -
4. Ratio Percentage change
A price falls from £393.00 to £367.00. Calculate the percentage decrease
Answer: 6.6% -
5. Statistics Median
Calculate the median of: 35, 15, 13, 19, 34, 18
Answer: 18.5