Keystones — Lintel
Five GCSE retrieval questions · 2 April 2012 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.00069 in standard form
Answer: 6.9 × 10-4 -
2. Algebra Factorising monic quadratics
Factorise: x² - 17x + 66
Answer: (x - 6)(x - 11) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 18cm, angle = 31°. Find adjacent side. Give your answer to 2 decimal places
Answer: 15.43cm -
4. Ratio Mixed ratio problems
In ratio 12:11:10, what fraction is the second part?
Answer: 1⁄3 -
5. Statistics Mean
Calculate the mean of: 28, 44, 12, 38, 48, 49, 11. Give your answer to 2 decimal places
Answer: 32.86