Keystones — Cornerstone
Five GCSE retrieval questions · 3 May 2025 · mathsvault.uk/keystones
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1. Number
Calculate: 76 + 75
Answer: 76 + 75 = 151 -
2. Algebra
Solve: 7x = 70
Answer: x = 10 -
3. Geometry
Calculate the area of a circle with diameter 20cm
Answer: 314.16cm² -
4. Ratio
Simplify the ratio 20:25
Answer: 4:5 -
5. Statistics
Calculate the mean of: 8, 9, 5, 22, 24, 42, 19, 5
Answer: 16.8