Keystones — Lintel
Five GCSE retrieval questions · 20 June 2014 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.000076 in standard form
Answer: 7.6 × 10-5 -
2. Algebra Factorising monic quadratics
Factorise: x² + 6x - 40
Answer: (x + 10)(x - 4) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 22cm, angle = 44°. Find opposite. Give your answer to 2 decimal places
Answer: 21.25cm -
4. Ratio Mixed ratio problems
In ratio 11:7:4, what fraction is the first part?
Answer: 1⁄2 -
5. Statistics Mean
Calculate the mean of: 14, 23, 5, 19, 6, 33. Give your answer to 2 decimal places
Answer: 16.67