Keystones — Lintel
Five GCSE retrieval questions · 10 February 2015 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.0011 in standard form
Answer: 1.1 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² - x - 6
Answer: (x + 2)(x - 3) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 25cm, angle = 52°. Find adjacent side. Give your answer to 2 decimal places
Answer: 15.39cm -
4. Ratio Mixed ratio problems
In ratio 10:7:6, what fraction is the first part?
Answer: 10⁄23 -
5. Statistics Mean
Calculate the mean of: 6, 18, 15, 17, 45, 43, 37, 34. Give your answer to 2 decimal places
Answer: 26.88