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Lintel · Grades 5–7 Keystones #1 13 May 2011 Skills week 1 of 7
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Five GCSE retrieval questions · 13 May 2011 · mathsvault.uk/keystones

  1. 1. Number Converting to standard form

    Write 11,000 in standard form

    Answer: 1.1 × 104
  2. 2. Algebra Factorising monic quadratics

    Factorise: x² - 3x - 10

    Answer: (x + 2)(x - 5)
  3. 3. Geometry SOHCAHTOA — missing length

    Hypotenuse = 36cm, angle = 28°. Find adjacent side. Give your answer to 2 decimal places

    Answer: 31.79cm
  4. 4. Ratio Mixed ratio problems

    Simplify: 8:8:20

    Answer: 2:2:5
  5. 5. Statistics Mean

    Calculate the mean of: 46, 17, 29, 45, 12, 27, 24, 10

    Answer: 26.25

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