Keystones — Bedrock
Five GCSE retrieval questions · 25 December 2025 · mathsvault.uk/keystones
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1. Number
Calculate: -7 + 2
Answer: -5 -
2. Algebra
Factorise: 40x + 20
Answer: 5(8x + 4) -
3. Geometry
Opposite = 15cm, hypotenuse = 21.2cm. Find the angle
Answer: 45° (approximately) -
4. Ratio
Simplify the ratio 4:8
Answer: 1:2 -
5. Statistics
Find the mean of: 11, 10, 9
Answer: 10