Keystones — Cornerstone
Five GCSE retrieval questions · 17 February 2023 · mathsvault.uk/keystones
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1. Number
Calculate: 61 + 47
Answer: 61 + 47 = 108 -
2. Algebra
Factorise: 30x + 12
Answer: 6(5x + 2) -
3. Geometry
Find the perimeter of a right triangle with sides 3cm and 4cm
Answer: 12cm -
4. Ratio
Simplify the ratio 20:24
Answer: 5:6 -
5. Statistics
Calculate the mean of: 25, 10, 33, 49, 6, 35
Answer: 26.3