Keystones — Cornerstone
Five GCSE retrieval questions · 19 February 2025 · mathsvault.uk/keystones
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1. Number
Calculate: 57 + 24
Answer: 57 + 24 = 81 -
2. Algebra
For y = x³, find y when x = 5
Answer: y = 125 -
3. Geometry
Calculate perimeter: two sides are 15cm and 15cm at right angles
Answer: 51.2cm -
4. Ratio
Calculate 10% of 171
Answer: 17.1 -
5. Statistics
Find the mean of: 18, 20, 19
Answer: 19