Keystones — Lintel
Five GCSE retrieval questions · 6 April 2011 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.00053 in standard form
Answer: 5.3 × 10-4 -
2. Algebra Factorising monic quadratics
Factorise: x² - 15x + 56
Answer: (x - 7)(x - 8) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 17cm, angle = 53°. Find adjacent side. Give your answer to 2 decimal places
Answer: 10.23cm -
4. Ratio Mixed ratio problems
In ratio 12:9:12, what fraction is the second part?
Answer: 3⁄11 -
5. Statistics Mean
Calculate the mean of: 18, 22, 27, 8, 46, 22, 23, 50
Answer: 27