Keystones — Lintel
Five GCSE retrieval questions · 17 September 2012 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.0088 in standard form
Answer: 8.8 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² - 5x - 6
Answer: (x + 1)(x - 6) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 25cm, angle = 41°. Find opposite. Give your answer to 2 decimal places
Answer: 21.73cm -
4. Ratio Mixed ratio problems
In ratio 7:9:5, what fraction is the first part?
Answer: 1⁄3 -
5. Statistics Mean
Calculate the mean of: 29, 43, 33, 46, 41, 49, 38. Give your answer to 2 decimal places
Answer: 39.86