Keystones — Lintel
Five GCSE retrieval questions · 19 November 2013 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 6,000,000 in standard form
Answer: 6 × 106 -
2. Algebra Factorising monic quadratics
Factorise: x² - 2x - 3
Answer: (x + 1)(x - 3) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 24cm, angle = 51°. Find opposite. Give your answer to 2 decimal places
Answer: 29.64cm -
4. Ratio Mixed ratio problems
Black, white and yellow marbles are in the ratio 6:11:8. What fraction of the marbles are white?
Answer: 11⁄25 -
5. Statistics Mean
Calculate the mean of: 19, 14, 28, 29, 26, 46
Answer: 27