Keystones — Cornerstone
Five GCSE retrieval questions · 18 January 2026 · mathsvault.uk/keystones
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1. Number
Calculate: 48 + 62
Answer: 48 + 62 = 110 -
2. Algebra
Factorise: 6x² + 4x
Answer: 2x(3x + 2) -
3. Geometry
Find the hypotenuse of a right triangle with sides 5cm and 12cm
Answer: 13cm -
4. Ratio
Simplify the ratio 25:40
Answer: 5:8 -
5. Statistics
Find the mean of: 15, 18, 19
Answer: 17.333333333333