Keystones — Bedrock
Five GCSE retrieval questions · 11 October 2025 · mathsvault.uk/keystones
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1. Number
Calculate: 9.3 + 7.3
Answer: 9.3 + 7.3 = 16.6 -
2. Algebra
Factorise: 10x + 15
Answer: 5(2x + 3) -
3. Geometry
Opposite = 11cm, hypotenuse = 15.6cm. Find the angle
Answer: 45° (approximately) -
4. Ratio
Simplify the ratio 16:12
Answer: 4:3 -
5. Statistics
What is the probability of getting heads when flipping a fair coin?
Answer: 1⁄2