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Cornerstone · Grades 3–5 Keystones #1 8 August 2022
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Keystones — Cornerstone

Five GCSE retrieval questions · 8 August 2022 · mathsvault.uk/keystones

  1. 1. Number

    Calculate: 3⁄5 + 1⁄5

    Answer: 4⁄5
  2. 2. Algebra

    Factorise: 6x² + 3x

    Answer: 3x(2x + 1)
  3. 3. Geometry

    Calculate the area of a circle with diameter 21cm

    Answer: 346.36cm²
  4. 4. Ratio

    Simplify: 12:20:20

    Answer: 3:5:5
  5. 5. Statistics

    Find the mean of: 11, 6, 14, 11, 10

    Answer: 10.4

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