Keystones — Cornerstone
Five GCSE retrieval questions · 11 May 2026 · mathsvault.uk/keystones
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1. Number
Calculate: 46 + 54
Answer: 46 + 54 = 100 -
2. Algebra
Factorise: 4x² + 4x
Answer: 4x(x + 1) -
3. Geometry
Find the perimeter of a right triangle with sides 3cm and 4cm
Answer: 12cm -
4. Ratio
Simplify the ratio 30:20
Answer: 3:2 -
5. Statistics
Calculate the mean of: 8, 32, 21, 7, 20, 38, 12
Answer: 19.7