Keystones — Cornerstone
Five GCSE retrieval questions · 24 February 2026 · mathsvault.uk/keystones
-
1. Number Directed number mixed operations
Calculate: -1 × -3 + -5
Answer: -2 -
2. Algebra Linear nth term
Find the nth term: 13, 10, 7, 4, ...
Answer: 16 - 3n -
3. Geometry Area of a circle
Calculate the area of a circle with diameter 12cm
Answer: 113.cm² -
4. Ratio Percentage change
A price falls from £162.00 to £100.00. Calculate the percentage decrease
Answer: 38.3% -
5. Statistics Median
Calculate the median of: 31, 26, 28, 36, 26, 37
Answer: 29.5