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Lintel · Grades 5–7 Keystones #1 7 April 2014 Skills week 1 of 7
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Keystones — Lintel

Five GCSE retrieval questions · 7 April 2014 · mathsvault.uk/keystones

  1. 1. Number Converting to standard form

    Write 52,000 in standard form

    Answer: 5.2 × 104
  2. 2. Algebra Factorising monic quadratics

    Factorise: x² - 18x + 72

    Answer: (x - 6)(x - 12)
  3. 3. Geometry SOHCAHTOA — missing length

    Hypotenuse = 22cm, angle = 45°. Find adjacent side. Give your answer to 2 decimal places

    Answer: 15.56cm
  4. 4. Ratio Mixed ratio problems

    Express the first part of 15:11 as a fraction in simplest form

    Answer: 15⁄26
  5. 5. Statistics Mean

    Calculate the mean of: 6, 14, 47, 21, 46, 32. Give your answer to 2 decimal places

    Answer: 27.67

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