Keystones — Lintel
Five GCSE retrieval questions · 15 August 2011 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 9,700,000 in standard form
Answer: 9.7 × 106 -
2. Algebra Factorising monic quadratics
Factorise: x² - x - 72
Answer: (x + 8)(x - 9) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 37cm, angle = 26°. Find adjacent side. Give your answer to 2 decimal places
Answer: 33.26cm -
4. Ratio Mixed ratio problems
Simplify the ratio 5kg : 200g
Answer: 25:1 -
5. Statistics Mean
Calculate the mean of: 18, 37, 34, 42, 17, 36, 39, 10. Give your answer to 2 decimal places
Answer: 29.13