Keystones — Lintel
Five GCSE retrieval questions · 27 November 2013 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.0087 in standard form
Answer: 8.7 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² - 8x - 9
Answer: (x + 1)(x - 9) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 29cm, angle = 58°. Find adjacent side. Give your answer to 2 decimal places
Answer: 15.37cm -
4. Ratio Mixed ratio problems
Simplify: 4:4:8
Answer: 1:1:2 -
5. Statistics Mean
Calculate the mean of: 16, 34, 13, 38, 13, 13. Give your answer to 2 decimal places
Answer: 21.17