Keystones — Lintel
Five GCSE retrieval questions · 20 January 2016 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 56,000,000 in standard form
Answer: 5.6 × 107 -
2. Algebra Factorising monic quadratics
Factorise: x² - x - 90
Answer: (x + 9)(x - 10) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 36cm, angle = 35°. Find adjacent side. Give your answer to 2 decimal places
Answer: 29.49cm -
4. Ratio Mixed ratio problems
Express the first part of 14:9 as a fraction in simplest form
Answer: 14⁄23 -
5. Statistics Mean
Calculate the mean of: 49, 47, 26, 11, 9, 9, 48, 9
Answer: 26