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Cornerstone · Grades 3–5 Keystones #1 21 July 2023
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Keystones — Cornerstone

Five GCSE retrieval questions · 21 July 2023 · mathsvault.uk/keystones

  1. 1. Number

    Calculate: 6⁄10 + 2⁄10

    Answer: 4⁄5
  2. 2. Algebra

    Solve: x + 9 = 22

    Answer: x = 13
  3. 3. Geometry

    Find the perimeter of a right triangle with sides 6cm, 8cm, 10cm

    Answer: 24cm
  4. 4. Ratio

    Calculate 50% of 28

    Answer: 14
  5. 5. Statistics

    Calculate the mean of: 27, 48, 20, 50, 12, 50, 44, 9

    Answer: 32.5

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