Keystones — Lintel
Five GCSE retrieval questions · 5 June 2011 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 3,900,000 in standard form
Answer: 3.9 × 106 -
2. Algebra Factorising monic quadratics
Factorise: x² - x - 56
Answer: (x + 7)(x - 8) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 19cm, angle = 45°. Find adjacent side. Give your answer to 2 decimal places
Answer: 13.44cm -
4. Ratio Mixed ratio problems
Simplify the ratio 4 litres : 850 ml
Answer: 80:17 -
5. Statistics Mean
Calculate the mean of: 35, 45, 32, 22, 18, 8. Give your answer to 2 decimal places
Answer: 26.67