Keystones — Lintel
Five GCSE retrieval questions · 8 October 2010 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.000058 in standard form
Answer: 5.8 × 10-5 -
2. Algebra Factorising monic quadratics
Factorise: x² - 13x + 12
Answer: (x - 1)(x - 12) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 11cm, angle = 41°. Find opposite. Give your answer to 2 decimal places
Answer: 9.56cm -
4. Ratio Mixed ratio problems
Simplify: 18:12:12
Answer: 3:2:2 -
5. Statistics Mean
Calculate the mean of: 26, 10, 31, 40, 10, 5, 29. Give your answer to 2 decimal places
Answer: 21.57