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Cornerstone · Grades 3–5 Keystones #1 11 November 2025
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Keystones — Cornerstone

Five GCSE retrieval questions · 11 November 2025 · mathsvault.uk/keystones

  1. 1. Number

    Calculate: 686 + 328

    Answer: 686 + 328 = 1014
  2. 2. Algebra

    Solve: x + 12 = 22

    Answer: x = 10
  3. 3. Geometry

    Opposite = 18cm, adjacent = 13cm. Calculate the angle

    Answer: 54.2°
  4. 4. Ratio

    Simplify the ratio 30:10

    Answer: 3:1
  5. 5. Statistics

    A bag has 6 red and 5 blue balls. What is the probability of picking a red ball?

    Answer: 6⁄11

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