Keystones — Lintel
Five GCSE retrieval questions · 27 November 2012 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 6,500,000 in standard form
Answer: 6.5 × 106 -
2. Algebra Factorising monic quadratics
Factorise: x² + x - 2
Answer: (x + 2)(x - 1) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 21cm, angle = 40°. Find adjacent side. Give your answer to 2 decimal places
Answer: 16.09cm -
4. Ratio Mixed ratio problems
Express the second part of 3:11 as a fraction in simplest form
Answer: 11⁄14 -
5. Statistics Mean
Calculate the mean of: 23, 38, 10, 42, 43, 43. Give your answer to 2 decimal places
Answer: 33.17