Keystones — Lintel
Five GCSE retrieval questions · 29 June 2014 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 340,000,000 in standard form
Answer: 3.4 × 108 -
2. Algebra Factorising monic quadratics
Factorise: x² + 2x - 15
Answer: (x + 5)(x - 3) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 35cm, angle = 62°. Find adjacent side. Give your answer to 2 decimal places
Answer: 16.43cm -
4. Ratio Mixed ratio problems
Black and white marbles are in the ratio 11:8. What fraction of the marbles are white?
Answer: 8⁄19 -
5. Statistics Mean
Calculate the mean of: 20, 12, 48, 33, 46, 46. Give your answer to 2 decimal places
Answer: 34.17