Keystones — Bedrock
Five GCSE retrieval questions · 24 December 2025 · mathsvault.uk/keystones
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1. Number Adding whole numbers
Calculate: 20 + 19
Answer: 20 + 19 = 39 -
2. Algebra Substitution
If x = 8, find the value of 2x + 5
Answer: 21 -
3. Geometry Converting lengths
Convert 25cm to mm
Answer: 250mm -
4. Ratio Simplifying ratios
Simplify the ratio 16:14
Answer: 8:7 -
5. Statistics Mean
Find the mean of: 7, 7, 20, 16
Answer: 12.5