Keystones — Lintel
Five GCSE retrieval questions · 15 September 2011 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 6,700,000 in standard form
Answer: 6.7 × 106 -
2. Algebra Factorising monic quadratics
Factorise: x² + 11x + 10
Answer: (x + 10)(x + 1) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 17cm, angle = 42°. Find adjacent side. Give your answer to 2 decimal places
Answer: 12.63cm -
4. Ratio Mixed ratio problems
Express the first part of 15:5 as a fraction in simplest form
Answer: 3⁄4 -
5. Statistics Mean
Calculate the mean of: 7, 17, 40, 5, 30, 40, 41. Give your answer to 2 decimal places
Answer: 25.71