Keystones — Lintel
Five GCSE retrieval questions · 6 August 2010 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.086 in standard form
Answer: 8.6 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² - 11x + 18
Answer: (x - 2)(x - 9) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 22cm, angle = 42°. Find opposite. Give your answer to 2 decimal places
Answer: 19.81cm -
4. Ratio Mixed ratio problems
Divide 162 in the ratio 3:2:1
Answer: 81, 54 and 27 -
5. Statistics Mean
Calculate the mean of: 11, 36, 41, 17, 29, 17, 49. Give your answer to 2 decimal places
Answer: 28.57