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Cornerstone · Grades 3–5 Keystones #1 11 April 2021
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Keystones — Cornerstone

Five GCSE retrieval questions · 11 April 2021 · mathsvault.uk/keystones

  1. 1. Number

    Calculate: 2⁄5 + 2⁄5

    Answer: 4⁄5
  2. 2. Algebra

    Factorise: 9x² + 4x

    Answer: x(9x + 4)
  3. 3. Geometry

    Find the area of a circle with radius 7cm

    Answer: 153.94cm²
  4. 4. Ratio

    Simplify: 15:9:12

    Answer: 5:3:4
  5. 5. Statistics

    Calculate the range of: 91, 91, 44, 45, 47, 76

    Answer: 47

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