Keystones — Cornerstone
Five GCSE retrieval questions · 18 November 2023 · mathsvault.uk/keystones
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1. Number
Calculate: 715 + 485
Answer: 715 + 485 = 1200 -
2. Algebra
Expand: 5(x + 9)
Answer: 5x + 45 -
3. Geometry
Find the perimeter of a right triangle with sides 5cm, 12cm, 13cm
Answer: 30cm -
4. Ratio
Simplify: 8:10:10
Answer: 4:5:5 -
5. Statistics
Calculate the mean of: 21, 14, 34, 36, 41, 35
Answer: 30.2