Keystones — Lintel
Five GCSE retrieval questions · 17 August 2012 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.0012 in standard form
Answer: 1.2 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² + 2x - 35
Answer: (x + 7)(x - 5) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 20cm, angle = 56°. Find opposite. Give your answer to 2 decimal places
Answer: 29.65cm -
4. Ratio Mixed ratio problems
Express the second part of 9:3 as a fraction in simplest form
Answer: 1⁄4 -
5. Statistics Mean
Calculate the mean of: 14, 35, 5, 38, 18, 19
Answer: 21.5