Keystones — Bedrock
Five GCSE retrieval questions · 10 October 2011 · mathsvault.uk/keystones
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1. Number Adding whole numbers
Calculate: 21 + 21
Answer: 21 + 21 = 42 -
2. Algebra Substitution
If x = 7, find the value of 2x + 8
Answer: 22 -
3. Geometry Converting lengths
Convert 44cm to mm
Answer: 440mm -
4. Ratio Simplifying ratios
Simplify the ratio 8:28
Answer: 2:7 -
5. Statistics Mean
Find the mean of: 15, 8, 11, 10
Answer: 11