Keystones — Lintel
Five GCSE retrieval questions · 16 November 2015 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.062 in standard form
Answer: 6.2 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² - 2x - 63
Answer: (x + 7)(x - 9) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 29cm, angle = 37°. Find opposite. Give your answer to 2 decimal places
Answer: 21.85cm -
4. Ratio Mixed ratio problems
In ratio 10:10:8, what fraction is the first part?
Answer: 5⁄14 -
5. Statistics Mean
Calculate the mean of: 45, 23, 30, 23, 36, 30. Give your answer to 2 decimal places
Answer: 31.17