Keystones — Bedrock
Five GCSE retrieval questions · 17 September 2025 · mathsvault.uk/keystones
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1. Number
Calculate: 20 + 19
Answer: 20 + 19 = 39 -
2. Algebra
Factorise: 21x + 21
Answer: 3(7x + 7) -
3. Geometry
Find the area of a circle with radius 4cm
Answer: 50.27cm² -
4. Ratio
Simplify the ratio 24:15
Answer: 8:5 -
5. Statistics
Find the mean of: 20, 5, 2, 12
Answer: 9.75