Keystones — Cornerstone
Five GCSE retrieval questions · 27 October 2026 · mathsvault.uk/keystones
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1. Number Directed number mixed operations
Calculate: 3 × -5 + 0
Answer: -15 -
2. Algebra Linear nth term
Find the nth term rule for: 7, 9, 11, 13, ...
Answer: 2n + 5 -
3. Geometry Area of a circle
Find the area of a circle with radius 5cm
Answer: 78.54cm² -
4. Ratio Percentage change
A price falls from £380.00 to £317.00. Calculate the percentage decrease
Answer: 16.6% -
5. Statistics Median
Calculate the median of: 40, 10, 26, 31, 26, 18
Answer: 26