Keystones — Lintel
Five GCSE retrieval questions · 7 January 2011 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.0009 in standard form
Answer: 9 × 10-4 -
2. Algebra Factorising monic quadratics
Factorise: x² + 9x - 10
Answer: (x + 10)(x - 1) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 38cm, angle = 53°. Find adjacent side. Give your answer to 2 decimal places
Answer: 22.87cm -
4. Ratio Mixed ratio problems
Simplify the ratio £8 : 30p
Answer: 80:3 -
5. Statistics Mean
Calculate the mean of: 45, 39, 43, 27, 13, 19
Answer: 31