Keystones — Lintel
Five GCSE retrieval questions · 21 April 2011 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 91,000 in standard form
Answer: 9.1 × 104 -
2. Algebra Factorising monic quadratics
Factorise: x² - 5x - 66
Answer: (x + 6)(x - 11) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 18cm, angle = 64°. Find adjacent side. Give your answer to 2 decimal places
Answer: 7.89cm -
4. Ratio Mixed ratio problems
Divide 117 in the ratio 4:1:4
Answer: 52, 13 and 52 -
5. Statistics Mean
Calculate the mean of: 19, 7, 29, 12, 6, 14, 5. Give your answer to 2 decimal places
Answer: 13.14