Keystones — Cornerstone
Five GCSE retrieval questions · 1 March 2025 · mathsvault.uk/keystones
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1. Number
What is the missing number: 95 + ? = 190
Answer: 95 -
2. Algebra
Expand: 6(x + 7)
Answer: 6x + 42 -
3. Geometry
Calculate the area of a circle with diameter 21cm
Answer: 346.36cm² -
4. Ratio
Simplify: 12:15:12
Answer: 4:5:4 -
5. Statistics
Calculate the mean of: 37, 24, 12, 30, 40, 34, 38, 19
Answer: 29.3