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Cornerstone · Grades 3–5 Keystones #1 28 July 2025
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Keystones — Cornerstone

Five GCSE retrieval questions · 28 July 2025 · mathsvault.uk/keystones

  1. 1. Number

    Calculate: 99 + 79

    Answer: 99 + 79 = 178
  2. 2. Algebra

    Simplify: 6x + 3x

    Answer: 9x
  3. 3. Geometry

    Opposite = 15cm, adjacent = 12cm. Calculate the angle

    Answer: 51.3°
  4. 4. Ratio

    Find 83% of 454

    Answer: 376.82
  5. 5. Statistics

    Calculate the mean of: 7, 30, 25, 43, 17, 44

    Answer: 27.7