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Lintel · Grades 5–7 Keystones #1 4 February 2018 Skills week 1 of 7
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Five GCSE retrieval questions · 4 February 2018 · mathsvault.uk/keystones

  1. 1. Number Converting to standard form

    Write 7,100,000 in standard form

    Answer: 7.1 × 106
  2. 2. Algebra Factorising monic quadratics

    Factorise: x² + 7x - 30

    Answer: (x + 10)(x - 3)
  3. 3. Geometry SOHCAHTOA — missing length

    Adjacent = 29cm, angle = 50°. Find opposite. Give your answer to 2 decimal places

    Answer: 34.56cm
  4. 4. Ratio Mixed ratio problems

    Express the first part of 7:11 as a fraction in simplest form

    Answer: 7⁄18
  5. 5. Statistics Mean

    Calculate the mean of: 5, 36, 22, 13, 48, 38, 15, 20. Give your answer to 2 decimal places

    Answer: 24.63

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