Keystones — Cornerstone
Five GCSE retrieval questions · 7 January 2026 · mathsvault.uk/keystones
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1. Number
What is the missing number: 73 + ? = 175
Answer: 102 -
2. Algebra
Find the next term: 17, 25, 33, 41, ...
Answer: 49 -
3. Geometry
Find the area of a circle with radius 7cm
Answer: 153.94cm² -
4. Ratio
Find 18% of 139
Answer: 25.02 -
5. Statistics
Find the mean of: 8, 6, 17
Answer: 10.333333333333