Keystones — Lintel
Five GCSE retrieval questions · 5 July 2010 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.0073 in standard form
Answer: 7.3 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² - 6x + 8
Answer: (x - 2)(x - 4) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 21cm, angle = 59°. Find adjacent side. Give your answer to 2 decimal places
Answer: 10.82cm -
4. Ratio Mixed ratio problems
Simplify: 15:18:12
Answer: 5:6:4 -
5. Statistics Mean
Calculate the mean of: 44, 30, 13, 42, 37, 13, 5, 19. Give your answer to 2 decimal places
Answer: 25.38