Keystones — Lintel
Five GCSE retrieval questions · 6 August 2011 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 960,000 in standard form
Answer: 9.6 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² - 10x + 9
Answer: (x - 1)(x - 9) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 27cm, angle = 33°. Find opposite. Give your answer to 2 decimal places
Answer: 17.53cm -
4. Ratio Mixed ratio problems
Divide 72 in the ratio 4:1:1
Answer: 48, 12 and 12 -
5. Statistics Mean
Calculate the mean of: 42, 6, 11, 9, 31, 49, 46. Give your answer to 2 decimal places
Answer: 27.71