Keystones — Lintel
Five GCSE retrieval questions · 2 March 2016 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.0073 in standard form
Answer: 7.3 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² + 17x + 70
Answer: (x + 10)(x + 7) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 27cm, angle = 45°. Find opposite
Answer: 27cm -
4. Ratio Mixed ratio problems
Express the second part of 2:12 as a fraction in simplest form
Answer: 6⁄7 -
5. Statistics Mean
Calculate the mean of: 19, 25, 26, 38, 22, 45, 24, 5
Answer: 25.5