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Cornerstone · Grades 3–5 Keystones #41 10 February 2026
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Keystones — Cornerstone

Five GCSE retrieval questions · 10 February 2026 · mathsvault.uk/keystones

  1. 1. Number

    Calculate: 7⁄12 + 4⁄12

    Answer: 11⁄12
  2. 2. Algebra

    Solve: 4x = 36

    Answer: x = 9
  3. 3. Geometry

    Opposite = 13cm, adjacent = 15cm. Calculate the angle

    Answer: 40.9°
  4. 4. Ratio

    Calculate 50% of 187

    Answer: 93.5
  5. 5. Statistics

    A bag has 4 red and 6 blue balls. What is the probability of picking a red ball?

    Answer: 2⁄5

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