Keystones — Cornerstone
Five GCSE retrieval questions · 20 July 2023 · mathsvault.uk/keystones
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1. Number
Calculate: -15 + (-7) + (-15)
Answer: -37 -
2. Algebra
Factorise: 6x² + 9x
Answer: 3x(2x + 3) -
3. Geometry
Calculate the area of a circle with diameter 13cm
Answer: 132.73cm² -
4. Ratio
Simplify the ratio 10:16
Answer: 5:8 -
5. Statistics
Find the mean of: 4, 11, 4
Answer: 6.3333333333333