Keystones — Cornerstone
Five GCSE retrieval questions · 23 December 2023 · mathsvault.uk/keystones
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1. Number
Calculate: 7.1 + 5.9
Answer: 7.1 + 5.9 = 13 -
2. Algebra
Factorise: 9x² + 6x
Answer: 3x(3x + 2) -
3. Geometry
Find the hypotenuse of a right triangle with sides 3cm and 4cm
Answer: 5cm -
4. Ratio
Simplify the ratio 28:12
Answer: 7:3 -
5. Statistics
Calculate the mean of: 10, 17, 40, 26, 26, 27, 5, 16
Answer: 20.9