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Cornerstone · Grades 3–5 Keystones #1 17 March 2021
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Keystones — Cornerstone

Five GCSE retrieval questions · 17 March 2021 · mathsvault.uk/keystones

  1. 1. Number

    Calculate: 3⁄7 + 2⁄7

    Answer: 5⁄7
  2. 2. Algebra

    Factorise: 3x² + 2x

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

    Calculate the area of a circle with diameter 20cm

    Answer: 314.16cm²
  4. 4. Ratio

    Simplify the ratio 10:20

    Answer: 1:2
  5. 5. Statistics

    Find the range of: 26, 28, 20, 6, 18

    Answer: 22

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