Keystones — Lintel
Five GCSE retrieval questions · 10 November 2012 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 52,000 in standard form
Answer: 5.2 × 104 -
2. Algebra Factorising monic quadratics
Factorise: x² + 19x + 90
Answer: (x + 10)(x + 9) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 35cm, angle = 54°. Find adjacent side. Give your answer to 2 decimal places
Answer: 20.57cm -
4. Ratio Mixed ratio problems
Express the second part of 4:7 as a fraction in simplest form
Answer: 7⁄11 -
5. Statistics Mean
Calculate the mean of: 33, 46, 9, 11, 7, 23, 34, 40. Give your answer to 2 decimal places
Answer: 25.38