Keystones — Lintel
Five GCSE retrieval questions · 15 February 2025 · mathsvault.uk/keystones
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1. Number
What is the missing number: 83 + ? = 130
Answer: 47 -
2. Algebra
Solve: x⁄5 = 2
Answer: x = 10 -
3. Geometry
Calculate the area of a circle with diameter 20cm
Answer: 314.16cm² -
4. Ratio
Calculate 41.7% of 831
Answer: 346.53 -
5. Statistics
Calculate the mean of: 6, 36, 47, 33, 11, 26, 8, 40
Answer: 25.9