Keystones — Lintel
Five GCSE retrieval questions · 26 July 2025 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.052
Answer: 5.2 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² - 6x + 8
Answer: (x - 2)(x - 4) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 38cm, angle = 50°. Find adjacent side
Answer: 24.4cm -
4. Ratio Mixed ratio problems
Express the first part of 6:5 as a fraction in simplest form
Answer: 6⁄11 -
5. Statistics Mean
Calculate the mean of: 31, 26, 44, 6, 49, 47
Answer: 33.8