Keystones — Cornerstone
Five GCSE retrieval questions · 15 August 2025 · mathsvault.uk/keystones
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1. Number
Calculate: 34 + (-30)
Answer: 4 -
2. Algebra
Solve: x + 9 = 22
Answer: x = 13 -
3. Geometry
Calculate the area of a circle with diameter 21cm
Answer: 346.36cm² -
4. Ratio
Simplify the ratio 20:10
Answer: 2:1 -
5. Statistics
Calculate the mean of: 49, 48, 46, 31, 14, 16, 6
Answer: 30