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Lintel · Grades 5–7 Keystones #1 10 July 2017 Skills week 1 of 7
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Five GCSE retrieval questions · 10 July 2017 · mathsvault.uk/keystones

  1. 1. Number Converting to standard form

    Write 690,000,000 in standard form

    Answer: 6.9 × 108
  2. 2. Algebra Factorising monic quadratics

    Factorise: x² - 4x - 32

    Answer: (x + 4)(x - 8)
  3. 3. Geometry SOHCAHTOA — missing length

    Hypotenuse = 31cm, angle = 29°. Find adjacent side. Give your answer to 2 decimal places

    Answer: 27.11cm
  4. 4. Ratio Mixed ratio problems

    Simplify: 6:6:15

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

    Calculate the mean of: 39, 26, 37, 23, 26, 34. Give your answer to 2 decimal places

    Answer: 30.83

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