Keystones — Bedrock
Five GCSE retrieval questions · 25 February 2011 · mathsvault.uk/keystones
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1. Number Adding whole numbers
Calculate: 42 + 80
Answer: 42 + 80 = 122 -
2. Algebra Substitution
If x = 7, find the value of 5x + 7
Answer: 42 -
3. Geometry Converting lengths
Convert 45cm to mm
Answer: 450mm -
4. Ratio Simplifying ratios
Simplify the ratio 24:20
Answer: 6:5 -
5. Statistics Mean
Find the mean of: 17, 4, 17, 15, 12
Answer: 13