Keystones — Lintel
Five GCSE retrieval questions · 12 May 2025 · mathsvault.uk/keystones
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1. Number Converting to standard form
35000
Answer: 3.5 × 104 -
2. Algebra Factorising monic quadratics
Factorise: x² - 10x + 21
Answer: (x - 3)(x - 7) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 32cm, angle = 47°. Find adjacent side
Answer: 21.8cm -
4. Ratio Mixed ratio problems
Express the first part of 3:4 as a fraction in simplest form
Answer: 3⁄7 -
5. Statistics Mean
Calculate the mean of: 8, 18, 49, 30, 11, 25, 12, 6
Answer: 19.9