Keystones — Cornerstone
Five GCSE retrieval questions · 14 April 2026 · mathsvault.uk/keystones
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1. Number Directed number mixed operations
Calculate: -10 + -4 - 1
Answer: -15 -
2. Algebra Linear nth term
Find the nth term rule for: 7, 13, 19, 25, ...
Answer: 6n + 1 -
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 £412.00 to £376.00. Calculate the percentage decrease
Answer: 8.7% -
5. Statistics Median
Calculate the median of: 29, 12, 34, 23, 26, 27
Answer: 26.5