Keystones — Lintel
Five GCSE retrieval questions · 5 June 2021 · mathsvault.uk/keystones
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1. Number Converting to standard form
51000
Answer: 5.1 × 104 -
2. Algebra Factorising monic quadratics
Factorise: x² - 9x + 20
Answer: (x - 4)(x - 5) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 22cm, angle = 60°. Find adjacent side
Answer: 11cm -
4. Ratio Mixed ratio problems
Express the first part of 3:2 as a fraction in simplest form
Answer: 3⁄5 -
5. Statistics Mean
Calculate the mean of: 30, 28, 11, 44, 24, 8
Answer: 24.2