Keystones — Lintel
Five GCSE retrieval questions · 18 March 2011 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 920,000 in standard form
Answer: 9.2 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² - 2x - 15
Answer: (x + 3)(x - 5) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 17cm, angle = 32°. Find opposite. Give your answer to 2 decimal places
Answer: 10.62cm -
4. Ratio Mixed ratio problems
Divide 280 in the ratio 2:2:1
Answer: 112, 112 and 56 -
5. Statistics Mean
Calculate the mean of: 46, 15, 43, 22, 5, 11. Give your answer to 2 decimal places
Answer: 23.67