Keystones — Lintel
Five GCSE retrieval questions · 11 February 2017 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 500,000 in standard form
Answer: 5 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² - 6x - 55
Answer: (x + 5)(x - 11) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 34cm, angle = 34°. Find adjacent side. Give your answer to 2 decimal places
Answer: 28.19cm -
4. Ratio Mixed ratio problems
Express the first part of 6:5 as a fraction in simplest form
Answer: 6⁄11 -
5. Statistics Mean
Calculate the mean of: 39, 6, 21, 34, 22, 31, 40, 28. Give your answer to 2 decimal places
Answer: 27.63