Keystones — Lintel
Five GCSE retrieval questions · 26 June 2012 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.000066 in standard form
Answer: 6.6 × 10-5 -
2. Algebra Factorising monic quadratics
Factorise: x² - 3x - 10
Answer: (x + 2)(x - 5) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 34cm, angle = 58°. Find adjacent side. Give your answer to 2 decimal places
Answer: 18.02cm -
4. Ratio Mixed ratio problems
Express the first part of 2:9 as a fraction in simplest form
Answer: 2⁄11 -
5. Statistics Mean
Calculate the mean of: 9, 23, 28, 33, 34, 36, 28, 45
Answer: 29.5