Keystones — Lintel
Five GCSE retrieval questions · 22 October 2014 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.0061 in standard form
Answer: 6.1 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² - 2x - 80
Answer: (x + 8)(x - 10) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 23cm, angle = 53°. Find adjacent side. Give your answer to 2 decimal places
Answer: 13.84cm -
4. Ratio Mixed ratio problems
Simplify: 10:12:12
Answer: 5:6:6 -
5. Statistics Mean
Calculate the mean of: 11, 23, 46, 9, 42, 26, 24. Give your answer to 2 decimal places
Answer: 25.86