Keystones — Lintel
Five GCSE retrieval questions · 19 May 2010 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.000013 in standard form
Answer: 1.3 × 10-5 -
2. Algebra Factorising monic quadratics
Factorise: x² - 11x + 18
Answer: (x - 2)(x - 9) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 38cm, angle = 37°. Find adjacent side. Give your answer to 2 decimal places
Answer: 30.35cm -
4. Ratio Mixed ratio problems
In ratio 11:3:11, what fraction is the second part?
Answer: 3⁄25 -
5. Statistics Mean
Calculate the mean of: 15, 16, 35, 28, 7, 5. Give your answer to 2 decimal places
Answer: 17.67