Keystones — Bedrock
Five GCSE retrieval questions · 29 October 2025 · mathsvault.uk/keystones
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1. Number Adding whole numbers
Calculate: 20 + 16
Answer: 20 + 16 = 36 -
2. Algebra Substitution
If x = 5, find the value of 8x + 7
Answer: 47 -
3. Geometry Converting lengths
Convert 35cm to mm
Answer: 350mm -
4. Ratio Simplifying ratios
Simplify the ratio 9:21
Answer: 3:7 -
5. Statistics Mean
Find the mean of: 20, 11, 14, 19, 13
Answer: 15.4