Keystones — Lintel
Five GCSE retrieval questions · 11 November 2020 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.00075
Answer: 7.5 × 10-4 -
2. Algebra Factorising monic quadratics
Factorise: x² - 6x + 8
Answer: (x - 4)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 23cm, angle = 48°. Find adjacent side
Answer: 15.4cm -
4. Ratio Mixed ratio problems
Express the first part of 2:6 as a fraction in simplest form
Answer: 1⁄4 -
5. Statistics Mean
Calculate the mean of: 33, 12, 32, 36, 41, 20, 10
Answer: 26.3