Keystones — Lintel
Five GCSE retrieval questions · 20 December 2020 · mathsvault.uk/keystones
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1. Number Converting to standard form
1600000
Answer: 1.6 × 106 -
2. Algebra Factorising monic quadratics
Factorise: x² - 13x + 42
Answer: (x - 7)(x - 6) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 21cm, angle = 26°. Find adjacent side
Answer: 18.9cm -
4. Ratio Mixed ratio problems
Express the first part of 4:2 as a fraction in simplest form
Answer: 2⁄3 -
5. Statistics Mean
Calculate the mean of: 19, 14, 29, 25, 12, 39, 26
Answer: 23.4