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Lintel · Grades 5–7 Keystones #1 17 August 2013 Skills week 1 of 7
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Keystones — Lintel

Five GCSE retrieval questions · 17 August 2013 · mathsvault.uk/keystones

  1. 1. Number Converting to standard form

    Write 5,500,000 in standard form

    Answer: 5.5 × 106
  2. 2. Algebra Factorising monic quadratics

    Factorise: x² + 14x + 24

    Answer: (x + 12)(x + 2)
  3. 3. Geometry SOHCAHTOA — missing length

    Adjacent = 15cm, angle = 33°. Find opposite. Give your answer to 2 decimal places

    Answer: 9.74cm
  4. 4. Ratio Mixed ratio problems

    Express the first part of 12:2 as a fraction in simplest form

    Answer: 6⁄7
  5. 5. Statistics Mean

    Calculate the mean of: 8, 47, 23, 41, 8, 39, 50. Give your answer to 2 decimal places

    Answer: 30.86

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