Keystones — Cornerstone
Five GCSE retrieval questions · 4 November 2021 · mathsvault.uk/keystones
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1. Number
What is the missing number: 91 + ? = 162
Answer: 71 -
2. Algebra
Factorise: 7x² + 4x
Answer: x(7x + 4) -
3. Geometry
Find the area of a circle with radius 3cm
Answer: 28.27cm² -
4. Ratio
Simplify: 12:8:20
Answer: 3:2:5 -
5. Statistics
Find the mean of: 12, 15, 6, 13
Answer: 11.5