Keystones — Cornerstone
Five GCSE retrieval questions · 9 September 2026 · mathsvault.uk/keystones
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1. Number Directed number mixed operations
Calculate: 4 + 5 - 10
Answer: -1 -
2. Algebra Linear nth term
Find the nth term: 30, 25, 20, 15, ...
Answer: 35 - 5n -
3. Geometry Area of a circle
Find the area of a circle with radius 9cm
Answer: 254.47cm² -
4. Ratio Percentage change
A value increases from 114 to 171. What is the percentage change?
Answer: 50% -
5. Statistics Median
Find the median of: 12, 18, 6, 17, 15
Answer: 15