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Lintel · Grades 5–7 Keystones #1 14 September 2022 Skills week 1 of 7
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Five GCSE retrieval questions · 14 September 2022 · mathsvault.uk/keystones

  1. 1. Number Converting to standard form

    190000

    Answer: 1.9 × 105
  2. 2. Algebra Factorising monic quadratics

    Factorise: x² - 11x + 30

    Answer: (x - 5)(x - 6)
  3. 3. Geometry SOHCAHTOA — missing length

    Hypotenuse = 34cm, angle = 58°. Find adjacent side

    Answer: 18cm
  4. 4. Ratio Mixed ratio problems

    Express the first part of 5:3 as a fraction in simplest form

    Answer: 5⁄8
  5. 5. Statistics Mean

    Calculate the mean of: 26, 7, 9, 17, 37, 7, 29

    Answer: 18.9

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