Keystones — Lintel
Five GCSE retrieval questions · 20 February 2019 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.00056
Answer: 5.6 × 10-4 -
2. Algebra Factorising monic quadratics
Factorise: x² - 9x + 14
Answer: (x - 2)(x - 7) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 20cm, angle = 55°. Find adjacent side
Answer: 11.5cm -
4. Ratio Mixed ratio problems
In ratio 4:3:2, what fraction is the second part?
Answer: 3⁄9 -
5. Statistics Mean
Calculate the mean of: 34, 31, 14, 28, 46, 24, 29, 25
Answer: 28.9