Keystones — Cornerstone
Five GCSE retrieval questions · 23 September 2023 · mathsvault.uk/keystones
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1. Number
What is the missing number: 55 + ? = 124
Answer: 69 -
2. Algebra
Factorise: 42x + 18
Answer: 6(7x + 3) -
3. Geometry
Find the area of a circle with radius 8cm
Answer: 201.06cm² -
4. Ratio
Simplify: 18:12:9
Answer: 6:4:3 -
5. Statistics
Find the mean of: 11, 14, 7, 11, 13
Answer: 11.2