Keystones — Lintel
Five GCSE retrieval questions · 28 August 2011 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 54,000 in standard form
Answer: 5.4 × 104 -
2. Algebra Factorising monic quadratics
Factorise: x² - x - 12
Answer: (x + 3)(x - 4) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 33cm, angle = 33°. Find adjacent side. Give your answer to 2 decimal places
Answer: 27.68cm -
4. Ratio Mixed ratio problems
Express the second part of 12:13 as a fraction in simplest form
Answer: 13⁄25 -
5. Statistics Mean
Calculate the mean of: 40, 12, 40, 25, 19, 33, 38, 43
Answer: 31.25