Keystones — Lintel
Five GCSE retrieval questions · 22 June 2011 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.066 in standard form
Answer: 6.6 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² + 6x - 27
Answer: (x + 9)(x - 3) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 17cm, angle = 31°. Find adjacent side. Give your answer to 2 decimal places
Answer: 14.57cm -
4. Ratio Mixed ratio problems
Simplify: 20:20:16
Answer: 5:5:4 -
5. Statistics Mean
Calculate the mean of: 11, 11, 14, 26, 7, 41. Give your answer to 2 decimal places
Answer: 18.33