Keystones — Lintel
Five GCSE retrieval questions · 15 April 2018 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.021
Answer: 2.1 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² - 6x + 8
Answer: (x - 4)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 22cm, angle = 32°. Find adjacent side
Answer: 18.7cm -
4. Ratio Mixed ratio problems
Express the first part of 6:2 as a fraction in simplest form
Answer: 3⁄4 -
5. Statistics Mean
Calculate the mean of: 28, 28, 25, 8, 20, 26, 18
Answer: 21.9