Keystones — Lintel
Five GCSE retrieval questions · 3 February 2025 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.0034
Answer: 3.4 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² + 2x - 24
Answer: (x + 6)(x - 4) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 25cm, angle = 36°. Find opposite
Answer: 18.2cm -
4. Ratio Mixed ratio problems
Simplify the ratio 7m:700cm
Answer: 1:100 -
5. Statistics Mean
Calculate the mean of: 23, 7, 30, 44, 20, 22, 6
Answer: 21.7