Keystones — Lintel
Five GCSE retrieval questions · 1 June 2012 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 6,200,000 in standard form
Answer: 6.2 × 106 -
2. Algebra Factorising monic quadratics
Factorise: x² - 5x - 50
Answer: (x + 5)(x - 10) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 28cm, angle = 44°. Find adjacent side. Give your answer to 2 decimal places
Answer: 20.14cm -
4. Ratio Mixed ratio problems
In ratio 8:1:12, what fraction is the third part?
Answer: 4⁄7 -
5. Statistics Mean
Calculate the mean of: 19, 28, 45, 6, 50, 41, 7
Answer: 28