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Cornerstone · Grades 3–5 Keystones #1 26 October 2025
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Keystones — Cornerstone

Five GCSE retrieval questions · 26 October 2025 · mathsvault.uk/keystones

  1. 1. Number

    Calculate: 468 + 356

    Answer: 468 + 356 = 824
  2. 2. Algebra

    Solve: x + 14 = 27

    Answer: x = 13
  3. 3. Geometry

    Opposite = 17cm, adjacent = 10cm. Calculate the angle

    Answer: 59.5°
  4. 4. Ratio

    Simplify: 6:12:10

    Answer: 3:6:5
  5. 5. Statistics

    Calculate the mean of: 40, 30, 42, 31, 7, 24

    Answer: 29