Keystones — Lintel
Five GCSE retrieval questions · 17 May 2012 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 320,000,000 in standard form
Answer: 3.2 × 108 -
2. Algebra Factorising monic quadratics
Factorise: x² - x - 56
Answer: (x + 7)(x - 8) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 22cm, angle = 42°. Find adjacent side. Give your answer to 2 decimal places
Answer: 16.35cm -
4. Ratio Mixed ratio problems
Express the second part of 3:5 as a fraction in simplest form
Answer: 5⁄8 -
5. Statistics Mean
Calculate the mean of: 16, 8, 24, 20, 34, 13, 17. Give your answer to 2 decimal places
Answer: 18.86