Keystones — Cornerstone
Five GCSE retrieval questions · 29 May 2026 · mathsvault.uk/keystones
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1. Number
Calculate: 28 + 33
Answer: 28 + 33 = 61 -
2. Algebra
Find the next term: 6, 10, 14, 18, ...
Answer: 22 -
3. Geometry
Find the distance between (3, 5) and (9, 12)
Answer: 9.22 -
4. Ratio
Simplify the ratio 15:40
Answer: 3:8 -
5. Statistics
Calculate the mean of: 27, 24, 13, 16, 44, 21, 10, 16
Answer: 21.4