Keystones — Lintel
Five GCSE retrieval questions · 8 August 2025 · mathsvault.uk/keystones
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1. Number Converting to standard form
70000000
Answer: 7 × 107 -
2. Algebra Factorising monic quadratics
Factorise: x² + x - 12
Answer: (x + 4)(x - 3) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 14cm, angle = 34°. Find opposite
Answer: 9.4cm -
4. Ratio Mixed ratio problems
Express the first part of 2:4 as a fraction in simplest form
Answer: 1⁄3 -
5. Statistics Mean
Calculate the mean of: 39, 33, 42, 18, 11, 19, 8, 16
Answer: 23.3