Keystones — Lintel
Five GCSE retrieval questions · 5 December 2025 · mathsvault.uk/keystones
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1. Number
Calculate: 765 + 350
Answer: 765 + 350 = 1115 -
2. Algebra
Factorise: 4x² + 2x
Answer: 2x(2x + 1) -
3. Geometry
Find the perimeter: hypotenuse = 12cm, one side = 9cm
Answer: 28.9cm -
4. Ratio
Find 26% of 135
Answer: 35.1 -
5. Statistics
Calculate the mean of: 43, 11, 50, 25, 26, 30, 35, 12
Answer: 29