Keystones — Bedrock
Five GCSE retrieval questions · 13 October 2011 · mathsvault.uk/keystones
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1. Number Adding whole numbers
Calculate: 29 + 20
Answer: 29 + 20 = 49 -
2. Algebra Substitution
If x = 10, find the value of 7x + 9
Answer: 79 -
3. Geometry Converting lengths
Convert 13cm to mm
Answer: 130mm -
4. Ratio Simplifying ratios
Simplify the ratio 40:30
Answer: 4:3 -
5. Statistics Mean
Find the mean of: 5, 5, 10, 20
Answer: 10