Keystones — Bedrock
Five GCSE retrieval questions · 21 October 2026 · mathsvault.uk/keystones
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1. Number Adding whole numbers
Calculate: 88 + 73
Answer: 88 + 73 = 161 -
2. Algebra Substitution
If x = 9, find the value of 2x + 9
Answer: 27 -
3. Geometry Converting lengths
Convert 16cm to mm
Answer: 160mm -
4. Ratio Simplifying ratios
Simplify the ratio 16:4
Answer: 4:1 -
5. Statistics Mean
Find the mean of: 12, 19, 20
Answer: 17