Keystones — Lintel
Five GCSE retrieval questions · 24 April 2018 · mathsvault.uk/keystones
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1. Number Converting to standard form
6400000
Answer: 6.4 × 106 -
2. Algebra Factorising monic quadratics
Factorise: x² - 9x + 18
Answer: (x - 6)(x - 3) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 30cm, angle = 34°. Find opposite
Answer: 20.2cm -
4. Ratio Mixed ratio problems
In ratio 1:4:2, what fraction is the second part?
Answer: 4⁄7 -
5. Statistics Mean
Calculate the mean of: 50, 17, 50, 19, 39, 18, 28
Answer: 31.6