Keystones — Cornerstone
Five GCSE retrieval questions · 2 August 2025 · mathsvault.uk/keystones
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1. Number
Calculate: 84 + 72
Answer: 84 + 72 = 156 -
2. Algebra
Collect like terms: 5x + 2y + 3x + 2y
Answer: 8x + 4y -
3. Geometry
Calculate the area of a circle with diameter 21cm
Answer: 346.36cm² -
4. Ratio
Simplify the ratio 8:28
Answer: 2:7 -
5. Statistics
Find the mean of: 19, 9, 13, 4
Answer: 11.25