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

  1. 1. Number Converting to standard form

    Write 60,000,000 in standard form

    Answer: 6 × 107
  2. 2. Algebra Factorising monic quadratics

    Factorise: x² - 4x - 5

    Answer: (x + 1)(x - 5)
  3. 3. Geometry SOHCAHTOA — missing length

    Adjacent = 13cm, angle = 48°. Find opposite. Give your answer to 2 decimal places

    Answer: 14.44cm
  4. 4. Ratio Mixed ratio problems

    Simplify the ratio 6m : 85cm

    Answer: 120:17
  5. 5. Statistics Mean

    Calculate the mean of: 25, 17, 14, 25, 50, 31

    Answer: 27

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