Keystones — Bedrock
Five GCSE retrieval questions · 21 October 2025 · mathsvault.uk/keystones
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1. Number
Round 145 to the nearest 10
Answer: 150 -
2. Algebra
Find the next term: 8, 12, 16, 20, ...
Answer: 24 -
3. Geometry
Opposite = 14cm, hypotenuse = 16.2cm. Find the angle
Answer: 60° (approximately) -
4. Ratio
Simplify the ratio 25:15
Answer: 5:3 -
5. Statistics
What is the probability of getting heads when flipping a fair coin?
Answer: 1⁄2