Keystones — Bedrock
Five GCSE retrieval questions · 15 July 2025 · mathsvault.uk/keystones
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1. Number Adding whole numbers
Calculate: 88 + 89
Answer: 88 + 89 = 177 -
2. Algebra Substitution
If x = 9, find the value of 2x + 7
Answer: 25 -
3. Geometry Converting lengths
Convert 42cm to mm
Answer: 420mm -
4. Ratio Simplifying ratios
Simplify the ratio 4:10
Answer: 2:5 -
5. Statistics Mean
Find the mean of: 15, 11, 5, 15, 13
Answer: 11.8