Keystones — Cornerstone
Five GCSE retrieval questions · 9 October 2025 · mathsvault.uk/keystones
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1. Number
Calculate: -3 + 5
Answer: 2 -
2. Algebra
Find the next term: 27, 37, 47, 57, ...
Answer: 67 -
3. Geometry
Calculate the hypotenuse when a = 6cm and b = 4cm
Answer: 7.21cm -
4. Ratio
Simplify: 15:18:12
Answer: 5:6:4 -
5. Statistics
Find the mean of: 15, 14, 5
Answer: 11.333333333333