Keystones — Lintel
Five GCSE retrieval questions · 19 November 2014 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 920,000,000 in standard form
Answer: 9.2 × 108 -
2. Algebra Factorising monic quadratics
Factorise: x² + 7x - 60
Answer: (x + 12)(x - 5) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 16cm, angle = 36°. Find opposite. Give your answer to 2 decimal places
Answer: 11.62cm -
4. Ratio Mixed ratio problems
Black, white and yellow marbles are in the ratio 8:10:6. What fraction of the marbles are black?
Answer: 1⁄3 -
5. Statistics Mean
Calculate the mean of: 34, 16, 18, 13, 30, 18
Answer: 21.5