Keystones — Cornerstone
Five GCSE retrieval questions · 9 January 2026 · mathsvault.uk/keystones
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1. Number
Calculate: 0 + 1
Answer: 1 -
2. Algebra
Solve: 5x = 30
Answer: x = 6 -
3. Geometry
Calculate the hypotenuse when a = 3cm and b = 9cm
Answer: 9.49cm -
4. Ratio
Simplify: 6:12:6
Answer: 1:2:1 -
5. Statistics
Calculate the mean of: 13, 50, 30, 13, 18, 44, 22, 32
Answer: 27.8