Keystones — Lintel
Five GCSE retrieval questions · 7 September 2013 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.096 in standard form
Answer: 9.6 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² - 13x + 22
Answer: (x - 2)(x - 11) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 29cm, angle = 36°. Find opposite. Give your answer to 2 decimal places
Answer: 21.07cm -
4. Ratio Mixed ratio problems
Express the second part of 13:14 as a fraction in simplest form
Answer: 14⁄27 -
5. Statistics Mean
Calculate the mean of: 34, 15, 14, 9, 12, 5. Give your answer to 2 decimal places
Answer: 14.83