Keystones — Lintel
Five GCSE retrieval questions · 5 January 2013 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.0006 in standard form
Answer: 6 × 10-4 -
2. Algebra Factorising monic quadratics
Factorise: x² - 9x - 22
Answer: (x + 2)(x - 11) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 14cm, angle = 33°. Find opposite. Give your answer to 2 decimal places
Answer: 9.09cm -
4. Ratio Mixed ratio problems
Divide 147 in the ratio 2:1:4
Answer: 42, 21 and 84 -
5. Statistics Mean
Calculate the mean of: 34, 20, 29, 19, 25, 46. Give your answer to 2 decimal places
Answer: 28.83