Keystones — Cornerstone
Five GCSE retrieval questions · 25 February 2026 · mathsvault.uk/keystones
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1. Number
Calculate: 73 + 94
Answer: 73 + 94 = 167 -
2. Algebra
Solve: 2x = 20
Answer: x = 10 -
3. Geometry
Calculate the area of a circle with diameter 24cm
Answer: 452.39cm² -
4. Ratio
Simplify the ratio 25:15
Answer: 5:3 -
5. Statistics
Find the mean of: 7, 7, 11, 11
Answer: 9