Keystones — Lintel
Five GCSE retrieval questions · 28 April 2019 · mathsvault.uk/keystones
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1. Number Converting to standard form
53000
Answer: 5.3 × 104 -
2. Algebra Factorising monic quadratics
Factorise: x² - 14x + 49
Answer: (x - 7)(x - 7) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 21cm, angle = 45°. Find adjacent side
Answer: 14.8cm -
4. Ratio Mixed ratio problems
In ratio 4:1:2, what fraction is the second part?
Answer: 1⁄7 -
5. Statistics Mean
Calculate the mean of: 6, 10, 20, 14, 20, 19, 12, 6
Answer: 13.4