Keystones — Lintel
Five GCSE retrieval questions · 5 May 2020 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.088
Answer: 8.8 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² - 13x + 42
Answer: (x - 6)(x - 7) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 21cm, angle = 38°. Find opposite
Answer: 16.4cm -
4. Ratio Mixed ratio problems
In ratio 4:2:1, what fraction is the second part?
Answer: 2⁄7 -
5. Statistics Mean
Calculate the mean of: 6, 20, 29, 16, 25, 16, 7
Answer: 17