Keystones — Lintel
Five GCSE retrieval questions · 16 December 2013 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 8,100,000 in standard form
Answer: 8.1 × 106 -
2. Algebra Factorising monic quadratics
Factorise: x² - 6x - 40
Answer: (x + 4)(x - 10) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 20cm, angle = 41°. Find adjacent side. Give your answer to 2 decimal places
Answer: 15.09cm -
4. Ratio Mixed ratio problems
Red and blue counters are in the ratio 11:3. What fraction of the counters are red?
Answer: 11⁄14 -
5. Statistics Mean
Calculate the mean of: 34, 44, 46, 11, 19, 34. Give your answer to 2 decimal places
Answer: 31.33