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

  1. 1. Number Converting to standard form

    Write 960,000 in standard form

    Answer: 9.6 × 105
  2. 2. Algebra Factorising monic quadratics

    Factorise: x² + 12x + 11

    Answer: (x + 11)(x + 1)
  3. 3. Geometry SOHCAHTOA — missing length

    Hypotenuse = 39cm, angle = 49°. Find adjacent side. Give your answer to 2 decimal places

    Answer: 25.59cm
  4. 4. Ratio Mixed ratio problems

    In ratio 7:1:7, what fraction is the second part?

    Answer: 1⁄15
  5. 5. Statistics Mean

    Calculate the mean of: 26, 33, 34, 37, 35, 41, 11

    Answer: 31

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