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Lintel · Grades 5–7 Keystones #1 13 May 2016 Skills week 1 of 7
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Keystones — Lintel

Five GCSE retrieval questions · 13 May 2016 · mathsvault.uk/keystones

  1. 1. Number Converting to standard form

    Write 6,800,000 in standard form

    Answer: 6.8 × 106
  2. 2. Algebra Factorising monic quadratics

    Factorise: x² - 2x - 15

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

    Hypotenuse = 37cm, angle = 27°. Find adjacent side. Give your answer to 2 decimal places

    Answer: 32.97cm
  4. 4. Ratio Mixed ratio problems

    Express the first part of 7:8 as a fraction in simplest form

    Answer: 7⁄15
  5. 5. Statistics Mean

    Calculate the mean of: 46, 24, 18, 26, 22, 26

    Answer: 27

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