Keystones — Cornerstone
Five GCSE retrieval questions · 22 November 2025 · mathsvault.uk/keystones
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1. Number
Calculate: 44 + 40
Answer: 44 + 40 = 84 -
2. Algebra
Factorise: 3x² + 6x
Answer: 3x(x + 2) -
3. Geometry
Find the hypotenuse of a right triangle with sides 6cm and 8cm
Answer: 10cm -
4. Ratio
Simplify: 20:24:8
Answer: 5:6:2 -
5. Statistics
Find the mean of: 14, 12, 5, 4, 7
Answer: 8.4