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Lintel · Grades 5–7 Keystones #1 22 June 2010 Skills week 1 of 7
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Keystones — Lintel

Five GCSE retrieval questions · 22 June 2010 · mathsvault.uk/keystones

  1. 1. Number Converting to standard form

    Write 62,000 in standard form

    Answer: 6.2 × 104
  2. 2. Algebra Factorising monic quadratics

    Factorise: x² - 2x - 24

    Answer: (x + 4)(x - 6)
  3. 3. Geometry SOHCAHTOA — missing length

    Hypotenuse = 39cm, angle = 26°. Find adjacent side. Give your answer to 2 decimal places

    Answer: 35.05cm
  4. 4. Ratio Mixed ratio problems

    Express the second part of 6:11 as a fraction in simplest form

    Answer: 11⁄17
  5. 5. Statistics Mean

    Calculate the mean of: 37, 46, 15, 44, 7, 28, 44. Give your answer to 2 decimal places

    Answer: 31.57

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