Keystones — Lintel
Five GCSE retrieval questions · 23 November 2011 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 590,000 in standard form
Answer: 5.9 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² - 7x - 18
Answer: (x + 2)(x - 9) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 35cm, angle = 44°. Find adjacent side. Give your answer to 2 decimal places
Answer: 25.18cm -
4. Ratio Mixed ratio problems
Red and blue sweets are in the ratio 11:8. What fraction of the sweets are red?
Answer: 11⁄19 -
5. Statistics Mean
Calculate the mean of: 35, 43, 8, 22, 14, 21, 45, 8
Answer: 24.5