Keystones — Cornerstone
Five GCSE retrieval questions · 26 October 2026 · mathsvault.uk/keystones
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1. Number Directed number mixed operations
Calculate: 5 + -6 - -1
Answer: 0 -
2. Algebra Linear nth term
Find the nth term: 21, 18, 15, 12, ...
Answer: 24 - 3n -
3. Geometry Area of a circle
Calculate the area of a circle with diameter 11cm
Answer: 95.03cm² -
4. Ratio Percentage change
A price falls from £130.00 to £98.00. Calculate the percentage decrease
Answer: 24.6% -
5. Statistics Median
Find the median of: 20, 10, 14, 16, 7
Answer: 14