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Cornerstone · Grades 3–5 Keystones #1 1 November 2025
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Keystones — Cornerstone

Five GCSE retrieval questions · 1 November 2025 · mathsvault.uk/keystones

  1. 1. Number

    Calculate: 56 + 54

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

    Expand: 6(3x + 7)

    Answer: 18x + 42
  3. 3. Geometry

    Calculate the hypotenuse when a = 9cm and b = 13cm

    Answer: 15.81cm
  4. 4. Ratio

    Find 63% of 363

    Answer: 228.69
  5. 5. Statistics

    A bag has 6 red and 7 blue balls. What is the probability of picking a red ball?

    Answer: 6⁄13

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