Keystones — Lintel
Five GCSE retrieval questions · 26 August 2012 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 58,000,000 in standard form
Answer: 5.8 × 107 -
2. Algebra Factorising monic quadratics
Factorise: x² + 3x - 40
Answer: (x + 8)(x - 5) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 30cm, angle = 48°. Find adjacent side. Give your answer to 2 decimal places
Answer: 20.07cm -
4. Ratio Mixed ratio problems
In ratio 1:5:5, what fraction is the second part?
Answer: 5⁄11 -
5. Statistics Mean
Calculate the mean of: 28, 14, 34, 28, 12, 29, 20, 27
Answer: 24