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Cornerstone · Grades 3–5 Keystones #1 12 September 2021
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Keystones — Cornerstone

Five GCSE retrieval questions · 12 September 2021 · mathsvault.uk/keystones

  1. 1. Number

    Calculate: 6⁄12 + 5⁄12

    Answer: 11⁄12
  2. 2. Algebra

    Factorise: 48x + 42

    Answer: 6(8x + 7)
  3. 3. Geometry

    Find the distance between (1, 1) and (4, 5)

    Answer: 5
  4. 4. Ratio

    Simplify: 15:15:12

    Answer: 5:5:4
  5. 5. Statistics

    Calculate the mean of: 9, 40, 32, 14, 18, 38

    Answer: 25.2

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