Keystones — Lintel
Five GCSE retrieval questions · 29 July 2014 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 77,000,000 in standard form
Answer: 7.7 × 107 -
2. Algebra Factorising monic quadratics
Factorise: x² + 5x - 6
Answer: (x + 6)(x - 1) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 30cm, angle = 57°. Find adjacent side. Give your answer to 2 decimal places
Answer: 16.34cm -
4. Ratio Mixed ratio problems
In ratio 6:12:3, what fraction is the second part?
Answer: 4⁄7 -
5. Statistics Mean
Calculate the mean of: 26, 10, 30, 25, 17, 17, 16, 9
Answer: 18.75