Keystones — Cornerstone
Five GCSE retrieval questions · 26 July 2025 · mathsvault.uk/keystones
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1. Number
What is the missing number: 83 + ? = 186
Answer: 103 -
2. Algebra
Expand: 4(3x + 9)
Answer: 12x + 36 -
3. Geometry
Find the area of a circle with radius 10cm
Answer: 314.16cm² -
4. Ratio
Find 27% of 415
Answer: 112.05 -
5. Statistics
Find the mean of: 3, 8, 5, 15
Answer: 7.75