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Cornerstone · Grades 3–5 Keystones #1 11 November 2023
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Keystones — Cornerstone

Five GCSE retrieval questions · 11 November 2023 · mathsvault.uk/keystones

  1. 1. Number

    Calculate: 56 + 54

    Answer: 56 + 54 = 110
  2. 2. Algebra

    Factorise: 8x² + 3x

    Answer: x(8x + 3)
  3. 3. Geometry

    Calculate the area of a circle with diameter 12cm

    Answer: 113.cm²
  4. 4. Ratio

    Simplify the ratio 28:24

    Answer: 7:6
  5. 5. Statistics

    A bag has 4 red and 4 blue balls. What is the probability of picking a red ball?

    Answer: 1⁄2

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