Keystones — Lintel
Five GCSE retrieval questions · 1 November 2016 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.098 in standard form
Answer: 9.8 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² - 3x - 10
Answer: (x + 2)(x - 5) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 26cm, angle = 59°. Find adjacent side. Give your answer to 2 decimal places
Answer: 13.39cm -
4. Ratio Mixed ratio problems
Express the first part of 5:7 as a fraction in simplest form
Answer: 5⁄12 -
5. Statistics Mean
Calculate the mean of: 49, 34, 26, 18, 49, 9, 16, 19
Answer: 27.5