Keystones — Bedrock
Five GCSE retrieval questions · 26 October 2025 · mathsvault.uk/keystones
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1. Number
Calculate: 26 + 31
Answer: 26 + 31 = 57 -
2. Algebra
Factorise: 21x + 18
Answer: 3(7x + 6) -
3. Geometry
Opposite = 8cm, hypotenuse = 16cm. Find the angle
Answer: 30° (approximately) -
4. Ratio
Simplify the ratio 9:15
Answer: 3:5 -
5. Statistics
Find the mean of: 9, 16, 12, 12
Answer: 12.25