Keystones — Lintel
Five GCSE retrieval questions · 16 August 2019 · mathsvault.uk/keystones
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1. Number Converting to standard form
320000
Answer: 3.2 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² - 12x + 35
Answer: (x - 7)(x - 5) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 15cm, angle = 63°. Find adjacent side
Answer: 6.8cm -
4. Ratio Mixed ratio problems
In ratio 2:3:4, what fraction is the second part?
Answer: 3⁄9 -
5. Statistics Mean
Calculate the mean of: 31, 38, 23, 43, 9, 48, 9
Answer: 28.7