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Lintel · Grades 5–7 Keystones #1 29 March 2020 Skills week 1 of 7
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Keystones — Lintel

Five GCSE retrieval questions · 29 March 2020 · mathsvault.uk/keystones

  1. 1. Number Converting to standard form

    520000

    Answer: 5.2 × 105
  2. 2. Algebra Factorising monic quadratics

    Factorise: x² - 7x + 10

    Answer: (x - 2)(x - 5)
  3. 3. Geometry SOHCAHTOA — missing length

    Hypotenuse = 32cm, angle = 51°. Find adjacent side

    Answer: 20.cm
  4. 4. Ratio Mixed ratio problems

    Express the first part of 6:2 as a fraction in simplest form

    Answer: 3⁄4
  5. 5. Statistics Mean

    Calculate the mean of: 9, 16, 36, 15, 50, 46, 44

    Answer: 30.9

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