Keystones — Cornerstone
Five GCSE retrieval questions · 13 October 2023 · mathsvault.uk/keystones
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1. Number
Calculate: 38 + 62
Answer: 38 + 62 = 100 -
2. Algebra
Expand: 2(5x + 9)
Answer: 10x + 18 -
3. Geometry
Calculate the area of a circle with diameter 23cm
Answer: 415.48cm² -
4. Ratio
Simplify: 20:12:8
Answer: 5:3:2 -
5. Statistics
Find the mean of: 8, 2, 20
Answer: 10