Keystones — Lintel
Five GCSE retrieval questions · 28 December 2025 · mathsvault.uk/keystones
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1. Number Converting to standard form
2300000
Answer: 2.3 × 106 -
2. Algebra Factorising monic quadratics
Factorise: x² + 2x - 8
Answer: (x + 4)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 28cm, angle = 35°. Find opposite
Answer: 19.6cm -
4. Ratio Mixed ratio problems
Express the first part of 5:3 as a fraction in simplest form
Answer: 5⁄8 -
5. Statistics Mean
Calculate the mean of: 5, 40, 25, 39, 46, 43
Answer: 33