Keystones — Lintel
Five GCSE retrieval questions · 1 November 2011 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.0083 in standard form
Answer: 8.3 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² - 5x + 4
Answer: (x - 1)(x - 4) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 36cm, angle = 38°. Find adjacent side. Give your answer to 2 decimal places
Answer: 28.37cm -
4. Ratio Mixed ratio problems
Express the first part of 6:3 as a fraction in simplest form
Answer: 2⁄3 -
5. Statistics Mean
Calculate the mean of: 34, 26, 16, 33, 18, 18, 18, 40. Give your answer to 2 decimal places
Answer: 25.38