Keystones — Lintel
Five GCSE retrieval questions · 23 January 2016 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.000032 in standard form
Answer: 3.2 × 10-5 -
2. Algebra Factorising monic quadratics
Factorise: x² - 15x + 44
Answer: (x - 4)(x - 11) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 21cm, angle = 59°. Find opposite. Give your answer to 2 decimal places
Answer: 34.95cm -
4. Ratio Mixed ratio problems
Express the first part of 6:2 as a fraction in simplest form
Answer: 3⁄4 -
5. Statistics Mean
Calculate the mean of: 35, 48, 29, 40, 15, 25
Answer: 32