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Cornerstone · Grades 3–5 Keystones #1 4 March 2025
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Keystones — Cornerstone

Five GCSE retrieval questions · 4 March 2025 · mathsvault.uk/keystones

  1. 1. Number

    Add: 1⁄3 + 2⁄5

    Answer: 11⁄15
  2. 2. Algebra

    Expand: 2(5x + 7)

    Answer: 10x + 14
  3. 3. Geometry

    Calculate the area of a circle with diameter 14cm

    Answer: 153.94cm²
  4. 4. Ratio

    Calculate 10% of 166

    Answer: 16.6
  5. 5. Statistics

    Calculate the mean of: 30, 9, 46, 8, 20, 20, 28

    Answer: 23

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