Keystones — Lintel
Five GCSE retrieval questions · 9 May 2010 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 58,000,000 in standard form
Answer: 5.8 × 107 -
2. Algebra Factorising monic quadratics
Factorise: x² - 3x - 40
Answer: (x + 5)(x - 8) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 33cm, angle = 54°. Find adjacent side. Give your answer to 2 decimal places
Answer: 19.4cm -
4. Ratio Mixed ratio problems
Simplify: 9:6:18
Answer: 3:2:6 -
5. Statistics Mean
Calculate the mean of: 28, 11, 31, 18, 39, 18, 13, 39. Give your answer to 2 decimal places
Answer: 24.63