Keystones — Lintel
Five GCSE retrieval questions · 13 January 2015 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 31,000 in standard form
Answer: 3.1 × 104 -
2. Algebra Factorising monic quadratics
Factorise: x² - 9x - 10
Answer: (x + 1)(x - 10) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 26cm, angle = 63°. Find adjacent side. Give your answer to 2 decimal places
Answer: 11.8cm -
4. Ratio Mixed ratio problems
Express the second part of 3:14 as a fraction in simplest form
Answer: 14⁄17 -
5. Statistics Mean
Calculate the mean of: 46, 46, 33, 27, 19, 42
Answer: 35.5