Keystones — Lintel
Five GCSE retrieval questions · 12 April 2014 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.0049 in standard form
Answer: 4.9 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² - 3x + 2
Answer: (x - 1)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 38cm, angle = 36°. Find adjacent side. Give your answer to 2 decimal places
Answer: 30.74cm -
4. Ratio Mixed ratio problems
Simplify: 8:24:24
Answer: 1:3:3 -
5. Statistics Mean
Calculate the mean of: 20, 42, 32, 43, 9, 17. Give your answer to 2 decimal places
Answer: 27.17