Keystones — Lintel
Five GCSE retrieval questions · 23 August 2025 · mathsvault.uk/keystones
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1. Number Converting to standard form
2800000
Answer: 2.8 × 106 -
2. Algebra Factorising monic quadratics
Factorise: x² + 6x - 16
Answer: (x + 8)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 19cm, angle = 53°. Find adjacent side
Answer: 11.4cm -
4. Ratio Mixed ratio problems
Simplify the ratio 7m:700cm
Answer: 1:100 -
5. Statistics Mean
Calculate the mean of: 46, 26, 23, 10, 12, 28, 33, 50
Answer: 28.5