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Lintel · Grades 5–7 Keystones #1 8 April 2013 Skills week 1 of 7
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Five GCSE retrieval questions · 8 April 2013 · mathsvault.uk/keystones

  1. 1. Number Converting to standard form

    Write 2,300,000 in standard form

    Answer: 2.3 × 106
  2. 2. Algebra Factorising monic quadratics

    Factorise: x² - 9x - 10

    Answer: (x + 1)(x - 10)
  3. 3. Geometry SOHCAHTOA — missing length

    Hypotenuse = 33cm, angle = 25°. Find adjacent side. Give your answer to 2 decimal places

    Answer: 29.91cm
  4. 4. Ratio Mixed ratio problems

    Simplify: 12:10:10

    Answer: 6:5:5
  5. 5. Statistics Mean

    Calculate the mean of: 11, 14, 30, 9, 15, 33. Give your answer to 2 decimal places

    Answer: 18.67

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