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Cornerstone · Grades 3–5 Keystones #1 13 May 2023
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Keystones — Cornerstone

Five GCSE retrieval questions · 13 May 2023 · mathsvault.uk/keystones

  1. 1. Number

    Calculate: 7⁄10 + 1⁄10

    Answer: 4⁄5
  2. 2. Algebra

    Solve: 5x = 30

    Answer: x = 6
  3. 3. Geometry

    Calculate the perimeter of a right triangle with sides 11cm and 10cm

    Answer: 35.9cm
  4. 4. Ratio

    Simplify: 6:6:15

    Answer: 2:2:5
  5. 5. Statistics

    Calculate the range of: 84, 120, 47, 85, 48, 40

    Answer: 80

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