Keystones — Lintel
Five GCSE retrieval questions · 22 June 2020 · mathsvault.uk/keystones
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1. Number Converting to standard form
31000000
Answer: 3.1 × 107 -
2. Algebra Factorising monic quadratics
Factorise: x² - 11x + 28
Answer: (x - 7)(x - 4) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 21cm, angle = 30°. Find adjacent side
Answer: 18.2cm -
4. Ratio Mixed ratio problems
In ratio 3:3:4, what fraction is the second part?
Answer: 3⁄10 -
5. Statistics Mean
Calculate the mean of: 23, 30, 39, 47, 50, 34, 46
Answer: 38.4