Keystones — Lintel
Five GCSE retrieval questions · 13 October 2014 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 900,000 in standard form
Answer: 9 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² + 15x + 54
Answer: (x + 9)(x + 6) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 19cm, angle = 40°. Find opposite. Give your answer to 2 decimal places
Answer: 15.94cm -
4. Ratio Mixed ratio problems
In ratio 11:12:11, what fraction is the first part?
Answer: 11⁄34 -
5. Statistics Mean
Calculate the mean of: 33, 40, 18, 9, 15, 16. Give your answer to 2 decimal places
Answer: 21.83