Keystones — Bedrock
Five GCSE retrieval questions · 26 December 2014 · mathsvault.uk/keystones
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1. Number Adding whole numbers
Calculate: 90 + 79
Answer: 90 + 79 = 169 -
2. Algebra Substitution
If x = 4, find the value of 4x + 7
Answer: 23 -
3. Geometry Converting lengths
Convert 25cm to mm
Answer: 250mm -
4. Ratio Simplifying ratios
Simplify the ratio 16:10
Answer: 8:5 -
5. Statistics Mean
Find the mean of: 21, 15, 5, 16, 13
Answer: 14