Keystones — Lintel
Five GCSE retrieval questions · 27 January 2014 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 670,000,000 in standard form
Answer: 6.7 × 108 -
2. Algebra Factorising monic quadratics
Factorise: x² - 9x + 8
Answer: (x - 1)(x - 8) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 13cm, angle = 57°. Find opposite. Give your answer to 2 decimal places
Answer: 20.02cm -
4. Ratio Mixed ratio problems
Red and blue counters are in the ratio 9:7. What fraction of the counters are red?
Answer: 9⁄16 -
5. Statistics Mean
Calculate the mean of: 26, 21, 18, 21, 44, 49. Give your answer to 2 decimal places
Answer: 29.83