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Lintel · Grades 5–7 Keystones #1 22 September 2016 Skills week 1 of 7
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Five GCSE retrieval questions · 22 September 2016 · mathsvault.uk/keystones

  1. 1. Number Converting to standard form

    Write 14,000 in standard form

    Answer: 1.4 × 104
  2. 2. Algebra Factorising monic quadratics

    Factorise: x² - 5x + 6

    Answer: (x - 2)(x - 3)
  3. 3. Geometry SOHCAHTOA — missing length

    Hypotenuse = 37cm, angle = 43°. Find adjacent side. Give your answer to 2 decimal places

    Answer: 27.06cm
  4. 4. Ratio Mixed ratio problems

    Express the second part of 6:15 as a fraction in simplest form

    Answer: 5⁄7
  5. 5. Statistics Mean

    Calculate the mean of: 23, 8, 9, 38, 30, 12

    Answer: 20

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