Keystones — Bedrock
Five GCSE retrieval questions · 7 January 2011 · mathsvault.uk/keystones
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1. Number Adding whole numbers
Calculate: 15 + 32
Answer: 15 + 32 = 47 -
2. Algebra Substitution
If x = 9, find the value of 3x + 9
Answer: 36 -
3. Geometry Converting lengths
Convert 12cm to mm
Answer: 120mm -
4. Ratio Simplifying ratios
Simplify the ratio 25:40
Answer: 5:8 -
5. Statistics Mean
Find the mean of: 4, 7, 25
Answer: 12