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Lintel · Grades 5–7 Keystones #1 29 April 2014 Skills week 1 of 7
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Five GCSE retrieval questions · 29 April 2014 · mathsvault.uk/keystones

  1. 1. Number Converting to standard form

    Write 340,000 in standard form

    Answer: 3.4 × 105
  2. 2. Algebra Factorising monic quadratics

    Factorise: x² - 3x - 40

    Answer: (x + 5)(x - 8)
  3. 3. Geometry SOHCAHTOA — missing length

    Adjacent = 12cm, angle = 34°. Find opposite. Give your answer to 2 decimal places

    Answer: 8.09cm
  4. 4. Ratio Mixed ratio problems

    Simplify: 4:6:12

    Answer: 2:3:6
  5. 5. Statistics Mean

    Calculate the mean of: 27, 20, 20, 14, 8, 39. Give your answer to 2 decimal places

    Answer: 21.33

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