Keystones — Cornerstone
Five GCSE retrieval questions · 13 July 2026 · mathsvault.uk/keystones
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1. Number
Calculate: 77 + 33
Answer: 77 + 33 = 110 -
2. Algebra
Solve: 2x = 18
Answer: x = 9 -
3. Geometry
Calculate the area of a circle with diameter 15cm
Answer: 176.71cm² -
4. Ratio
Calculate 25% of 111
Answer: 27.75 -
5. Statistics
Find the range of: 19, 26, 12, 14, 31
Answer: 19