Keystones — Lintel
Five GCSE retrieval questions · 1 July 2014 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.000082 in standard form
Answer: 8.2 × 10-5 -
2. Algebra Factorising monic quadratics
Factorise: x² + 2x - 63
Answer: (x + 9)(x - 7) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 18cm, angle = 46°. Find adjacent side. Give your answer to 2 decimal places
Answer: 12.5cm -
4. Ratio Mixed ratio problems
Express the first part of 14:4 as a fraction in simplest form
Answer: 7⁄9 -
5. Statistics Mean
Calculate the mean of: 15, 30, 37, 38, 35, 14, 49. Give your answer to 2 decimal places
Answer: 31.14