Keystones — Bedrock
Five GCSE retrieval questions · 11 November 2013 · mathsvault.uk/keystones
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1. Number Adding whole numbers
Calculate: 71 + 70
Answer: 71 + 70 = 141 -
2. Algebra Substitution
If x = 3, find the value of 6x + 3
Answer: 21 -
3. Geometry Converting lengths
Convert 25cm to mm
Answer: 250mm -
4. Ratio Simplifying ratios
Simplify the ratio 15:18
Answer: 5:6 -
5. Statistics Mean
Find the mean of: 8, 11, 7, 19, 20
Answer: 13