Keystones — Lintel
Five GCSE retrieval questions · 11 September 2025 · mathsvault.uk/keystones
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1. Number Converting to standard form
5000000
Answer: 5 × 106 -
2. Algebra Factorising monic quadratics
Factorise: x² - 8x + 16
Answer: (x - 4)(x - 4) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 17cm, angle = 60°. Find adjacent side
Answer: 8.5cm -
4. Ratio Mixed ratio problems
Simplify the ratio 6m:600cm
Answer: 1:100 -
5. Statistics Mean
Calculate the mean of: 41, 38, 26, 49, 44, 26, 38
Answer: 37.4