Keystones — Lintel
Five GCSE retrieval questions · 20 August 2012 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.0057 in standard form
Answer: 5.7 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² - 5x - 14
Answer: (x + 2)(x - 7) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 20cm, angle = 52°. Find opposite. Give your answer to 2 decimal places
Answer: 25.6cm -
4. Ratio Mixed ratio problems
Divide 207 in the ratio 2:3:4
Answer: 46, 69 and 92 -
5. Statistics Mean
Calculate the mean of: 30, 16, 44, 5, 17, 9. Give your answer to 2 decimal places
Answer: 20.17