Keystones — Cornerstone
Five GCSE retrieval questions · 7 June 2026 · mathsvault.uk/keystones
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1. Number Directed number mixed operations
Calculate: -2 + -5 - 8
Answer: -15 -
2. Algebra Linear nth term
Find the nth term: 16, 14, 12, 10, ...
Answer: 18 - 2n -
3. Geometry Area of a circle
Calculate the area of a circle with diameter 8cm
Answer: 50.27cm² -
4. Ratio Percentage change
A value increases from 128 to 221. What is the percentage change?
Answer: 72.7% -
5. Statistics Median
Calculate the median of: 16, 21, 22, 28, 28, 12
Answer: 21.5