Keystones — Lintel
Five GCSE retrieval questions · 11 June 2013 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 8,800,000 in standard form
Answer: 8.8 × 106 -
2. Algebra Factorising monic quadratics
Factorise: x² - x - 90
Answer: (x + 9)(x - 10) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 40cm, angle = 33°. Find adjacent side. Give your answer to 2 decimal places
Answer: 33.55cm -
4. Ratio Mixed ratio problems
Express the second part of 2:15 as a fraction in simplest form
Answer: 15⁄17 -
5. Statistics Mean
Calculate the mean of: 5, 34, 23, 40, 50, 9, 29. Give your answer to 2 decimal places
Answer: 27.14