Keystones — Cornerstone
Five GCSE retrieval questions · 8 February 2023 · mathsvault.uk/keystones
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1. Number
What is the missing number: 77 + ? = 174
Answer: 97 -
2. Algebra
Expand: 3(2x + 9)
Answer: 6x + 27 -
3. Geometry
Find the distance between (5, 5) and (11, 11)
Answer: 8.49 -
4. Ratio
Simplify: 18:9:18
Answer: 2:1:2 -
5. Statistics
Calculate the mean of: 50, 20, 26, 15, 17, 15, 36, 34
Answer: 26.6