Keystones — Cornerstone
Five GCSE retrieval questions · 22 June 2021 · mathsvault.uk/keystones
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1. Number
Calculate: 9²
Answer: 9² = 81 -
2. Algebra
Factorise: 7x² + 2x
Answer: x(7x + 2) -
3. Geometry
Find the hypotenuse of a right triangle with sides 6cm and 8cm
Answer: 10cm -
4. Ratio
Simplify the ratio 10:8
Answer: 5:4 -
5. Statistics
Find the range of: 18, 26, 14, 7, 11
Answer: 19