Keystones — Lintel
Five GCSE retrieval questions · 18 February 2026 · mathsvault.uk/keystones
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1. Number Converting to standard form
5500000
Answer: 5.5 × 106 -
2. Algebra Factorising monic quadratics
Factorise: x² - 6x + 8
Answer: (x - 4)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 18cm, angle = 32°. Find opposite
Answer: 11.2cm -
4. Ratio Mixed ratio problems
Express the first part of 2:6 as a fraction in simplest form
Answer: 1⁄4 -
5. Statistics Mean
Calculate the mean of: 47, 31, 37, 27, 47, 19, 11, 22
Answer: 30.1