Keystones — Lintel
Five GCSE retrieval questions · 6 September 2011 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 7,900,000 in standard form
Answer: 7.9 × 106 -
2. Algebra Factorising monic quadratics
Factorise: x² - 3x - 18
Answer: (x + 3)(x - 6) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 19cm, angle = 34°. Find opposite. Give your answer to 2 decimal places
Answer: 12.82cm -
4. Ratio Mixed ratio problems
Simplify the ratio 3kg : 350g
Answer: 60:7 -
5. Statistics Mean
Calculate the mean of: 47, 10, 42, 35, 18, 37, 27. Give your answer to 2 decimal places
Answer: 30.86