Keystones — Cornerstone
Five GCSE retrieval questions · 11 July 2021 · mathsvault.uk/keystones
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1. Number
Calculate: 80 + 55
Answer: 80 + 55 = 135 -
2. Algebra
Solve: 5x - 7 = 3x + -1
Answer: x = 3 -
3. Geometry
Calculate the area of a circle with diameter 13cm
Answer: 132.73cm² -
4. Ratio
Simplify the ratio 24:28
Answer: 6:7 -
5. Statistics
Calculate the mean of: 26, 29, 26, 31, 9, 5, 14, 22
Answer: 20.3