Keystones — Cornerstone
Five GCSE retrieval questions · 24 October 2025 · mathsvault.uk/keystones
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1. Number
Find the total of 266, 255, and 144
Answer: 665 -
2. Algebra
Factorise: 5x² + 6x
Answer: x(5x + 6) -
3. Geometry
Calculate the distance between (5, 6) and (8, 10)
Answer: 5 -
4. Ratio
Simplify: 18:15:6
Answer: 6:5:2 -
5. Statistics
Find the mean of: 8, 7, 13, 7, 20
Answer: 11