Keystones — Lintel
Five GCSE retrieval questions · 14 August 2025 · mathsvault.uk/keystones
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1. Number Converting to standard form
960000
Answer: 9.6 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² - 12x + 35
Answer: (x - 7)(x - 5) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 30cm, angle = 51°. Find adjacent side
Answer: 18.9cm -
4. Ratio Mixed ratio problems
Simplify the ratio 8m:800cm
Answer: 1:100 -
5. Statistics Mean
Calculate the mean of: 28, 38, 5, 49, 6, 45, 24
Answer: 27.9