Keystones — Cornerstone
Five GCSE retrieval questions · 26 February 2026 · mathsvault.uk/keystones
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1. Number Directed number mixed operations
Calculate: -4 × 1 + -5
Answer: -9 -
2. Algebra Linear nth term
Find the nth term rule for: 14, 20, 26, 32, ...
Answer: 6n + 8 -
3. Geometry Area of a circle
Calculate the area of a circle with diameter 20cm
Answer: 314.16cm² -
4. Ratio Percentage change
A price falls from £492.00 to £430.00. Calculate the percentage decrease
Answer: 12.6% -
5. Statistics Median
Find the median of: 12, 11, 10, 18, 5
Answer: 11