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Mathematical Notes

• Catriona Agg’s Puzzles

  • About the Solutions to Catriona Agg's Puzzles
  • Puzzles by year: 2026, 2025, 2023, 2022, 2021, 2020, 2019, 2018
  • Full List in reverse chronological order
  • Puzzle Gallery consisting of thumbnails of all the puzzles
  • Puzzles by Topic classifies the puzzles by the techniques needed to solve them.

• Topics in Mathematics (that are used in the solutions to the puzzles)

  • Geometry Topics
  • Number Topics
  • Algebra Topics

• Misconceptions