Keystones — Lintel
Five GCSE retrieval questions · 10 July 2011 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.009 in standard form
Answer: 9 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² + 11x + 10
Answer: (x + 10)(x + 1) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 19cm, angle = 48°. Find adjacent side. Give your answer to 2 decimal places
Answer: 12.71cm -
4. Ratio Mixed ratio problems
Simplify: 10:4:10
Answer: 5:2:5 -
5. Statistics Mean
Calculate the mean of: 20, 34, 37, 43, 32, 25. Give your answer to 2 decimal places
Answer: 31.83