Keystones — Lintel
Five GCSE retrieval questions · 1 March 2021 · mathsvault.uk/keystones
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1. Number Converting to standard form
9500000
Answer: 9.5 × 106 -
2. Algebra Factorising monic quadratics
Factorise: x² - 9x + 18
Answer: (x - 6)(x - 3) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 23cm, angle = 42°. Find adjacent side
Answer: 17.cm -
4. Ratio Mixed ratio problems
In ratio 3:4:4, what fraction is the second part?
Answer: 4⁄11 -
5. Statistics Mean
Calculate the mean of: 27, 37, 5, 7, 32, 42
Answer: 25