Keystones — Lintel
Five GCSE retrieval questions · 27 March 2013 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 860,000,000 in standard form
Answer: 8.6 × 108 -
2. Algebra Factorising monic quadratics
Factorise: x² - 21x + 110
Answer: (x - 10)(x - 11) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 26cm, angle = 37°. Find adjacent side. Give your answer to 2 decimal places
Answer: 20.76cm -
4. Ratio Mixed ratio problems
Divide 174 in the ratio 4:1:1
Answer: 116, 29 and 29 -
5. Statistics Mean
Calculate the mean of: 44, 15, 9, 25, 36, 40, 17, 11. Give your answer to 2 decimal places
Answer: 24.63