Problems
Classical mathematical problems, identified by magazine number (01 to 10)
Sort by

Knowledge
Integer points on a line: methods of solution
Many problems in discrete geometry are simply stated and can be used in teaching to make certain concepts easier to understand. Searching for points with integer coordinates on a line naturally leads to applications of theorems from number theory.
Denise GrenierApr 22, 2026

Math for everyone
Flexagon: a structure with hidden faces | Tangente
Mar 16, 2026

History and Culture
Flavius Josephus and the Josephus problem | Tangente
Mar 16, 2026

Math for everyone
flexacube: eight cubes, twelve faces | Tangente
Mar 16, 2026

Math for everyone
Magic figures: squares and stars | Tangente
Mar 16, 2026

Games and Challenges
Linearly independent families and linear independence in algebra | Tangente
Mar 16, 2026

Games and Challenges
Spanning family of a vector space | Tangente
Mar 16, 2026

Games and Challenges
Subfamily of vectors in linear algebra | Tangente
Mar 16, 2026

Games and Challenges
Sperner family and maximum antichain | Tangente
Mar 16, 2026

Games and Challenges
Homographic pencils and cross ratio | Tangente
Mar 16, 2026

Games and Challenges
Harmonic pencil and harmonic range | Tangente
Mar 16, 2026

Games and Challenges
Pencil of lines: affine and projective | Tangente
Mar 16, 2026

Games and Challenges
Pencil of conics: quadratic curves | Tangente
Mar 16, 2026

Games and Challenges
pencil of circles and radical axis in geometry | Tangente
Mar 16, 2026

Games and Challenges
Compact vector space: topology and compactness | Tangente
Mar 16, 2026

Games and Challenges
Vector space: foundation of linear algebra | Tangente
Mar 16, 2026

Games and Challenges
Connected metric space: topology | Tangente
Mar 16, 2026

Games and Challenges
Probability space: sample space, σ-algebra and measure | Tangente
Mar 16, 2026

Games and Challenges
compact metric space: compactness | Tangente
Mar 16, 2026

Games and Challenges
Locally compact space in topology | Tangente
Mar 16, 2026
