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

Five GCSE retrieval questions · 7 April 2013 · mathsvault.uk/keystones

  1. 1. Number Converting to standard form

    Write 3,100,000 in standard form

    Answer: 3.1 × 106
  2. 2. Algebra Factorising monic quadratics

    Factorise: x² + 4x - 32

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

    Hypotenuse = 40cm, angle = 33°. Find adjacent side. Give your answer to 2 decimal places

    Answer: 33.55cm
  4. 4. Ratio Mixed ratio problems

    Express the second part of 3:7 as a fraction in simplest form

    Answer: 7⁄10
  5. 5. Statistics Mean

    Calculate the mean of: 18, 34, 45, 37, 6, 22, 17. Give your answer to 2 decimal places

    Answer: 25.57

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