Keystones — Cornerstone
Five GCSE retrieval questions · 15 June 2023 · mathsvault.uk/keystones
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1. Number
What is the missing number: 91 + ? = 112
Answer: 21 -
2. Algebra
Solve: 8x + 10 = 7x + 15
Answer: x = 5 -
3. Geometry
Calculate the area of a circle with diameter 20cm
Answer: 314.16cm² -
4. Ratio
Simplify: 12:6:6
Answer: 2:1:1 -
5. Statistics
Calculate the mean of: 17, 43, 9, 27, 42, 37
Answer: 29.2