Keystones — Lintel
Five GCSE retrieval questions · 14 August 2013 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.000086 in standard form
Answer: 8.6 × 10-5 -
2. Algebra Factorising monic quadratics
Factorise: x² - 16x + 64
Answer: (x - 8)(x - 8) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 38cm, angle = 28°. Find adjacent side. Give your answer to 2 decimal places
Answer: 33.55cm -
4. Ratio Mixed ratio problems
Express the second part of 9:11 as a fraction in simplest form
Answer: 11⁄20 -
5. Statistics Mean
Calculate the mean of: 48, 44, 17, 32, 8, 11, 15, 26. Give your answer to 2 decimal places
Answer: 25.13