Keystones — Cornerstone
Five GCSE retrieval questions · 29 July 2026 · mathsvault.uk/keystones
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1. Number
Calculate: 29 + 52
Answer: 29 + 52 = 81 -
2. Algebra
Factorise: 4x² + 4x
Answer: 4x(x + 1) -
3. Geometry
Calculate the hypotenuse when a = 5cm and b = 15cm
Answer: 15.81cm -
4. Ratio
Calculate 10% of 160
Answer: 16 -
5. Statistics
Calculate the mean of: 42, 41, 24, 15, 30, 20, 44, 44
Answer: 32.5