Keystones — Cornerstone
Five GCSE retrieval questions · 24 July 2022 · mathsvault.uk/keystones
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1. Number
Calculate: 683 + 334
Answer: 683 + 334 = 1017 -
2. Algebra
Factorise: 5x² + 4x
Answer: x(5x + 4) -
3. Geometry
Find the perimeter of a right triangle with sides 3cm, 4cm, 5cm
Answer: 12cm -
4. Ratio
Simplify: 15:12:15
Answer: 5:4:5 -
5. Statistics
Calculate the mean of: 9, 48, 23, 15, 19, 45, 25, 44
Answer: 28.5