Keystones — Lintel
Five GCSE retrieval questions · 21 August 2018 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.0081
Answer: 8.1 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² - 11x + 28
Answer: (x - 7)(x - 4) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 37cm, angle = 41°. Find adjacent side
Answer: 27.9cm -
4. Ratio Mixed ratio problems
In ratio 2:3:1, what fraction is the second part?
Answer: 3⁄6 -
5. Statistics Mean
Calculate the mean of: 39, 28, 13, 19, 24, 29, 22
Answer: 24.9