Keystones — Lintel
Five GCSE retrieval questions · 6 May 2011 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.000048 in standard form
Answer: 4.8 × 10-5 -
2. Algebra Factorising monic quadratics
Factorise: x² - 5x - 36
Answer: (x + 4)(x - 9) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 32cm, angle = 46°. Find adjacent side. Give your answer to 2 decimal places
Answer: 22.23cm -
4. Ratio Mixed ratio problems
Express the first part of 7:10 as a fraction in simplest form
Answer: 7⁄17 -
5. Statistics Mean
Calculate the mean of: 27, 9, 11, 8, 29, 10, 48, 44
Answer: 23.25