Keystones — Cornerstone
Five GCSE retrieval questions · 15 September 2023 · mathsvault.uk/keystones
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1. Number
Calculate: 63 + 69
Answer: 63 + 69 = 132 -
2. Algebra
Factorise: 25x + 30
Answer: 5(5x + 6) -
3. Geometry
Calculate the area of a circle with diameter 18cm
Answer: 254.47cm² -
4. Ratio
Simplify: 12:4:12
Answer: 3:1:3 -
5. Statistics
Calculate the mean of: 46, 15, 11, 28, 29, 41, 39, 19
Answer: 28.5