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Cornerstone · Grades 3–5 Keystones #1 27 May 2022
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Keystones — Cornerstone

Five GCSE retrieval questions · 27 May 2022 · mathsvault.uk/keystones

  1. 1. Number

    Calculate: 50 + 82

    Answer: 50 + 82 = 132
  2. 2. Algebra

    Simplify: 7x + 9x

    Answer: 16x
  3. 3. Geometry

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

    Answer: 24cm
  4. 4. Ratio

    Simplify: 24:8:20

    Answer: 6:2:5
  5. 5. Statistics

    Calculate the mean of: 13, 39, 5, 9, 14, 15, 28

    Answer: 17.6

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