Keystones — Bedrock
Five GCSE retrieval questions · 26 September 2025 · mathsvault.uk/keystones
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1. Number
Calculate: 3⁄5 + 1⁄5
Answer: 4⁄5 -
2. Algebra
Factorise: 21x + 12
Answer: 3(7x + 4) -
3. Geometry
Opposite = 10cm, hypotenuse = 11.5cm. Find the angle
Answer: 60° (approximately) -
4. Ratio
Calculate 10% of 69
Answer: 6.9 -
5. Statistics
What is the probability of getting heads when flipping a fair coin?
Answer: 1⁄2