American Mathematical Monthly Problems

The American Mathematical Monthly is an expository journal intended for a wide audience of mathematicians, from undergraduate students to research professionals. Each issue has a Problems and Solutions section where new problems are proposed.
A good portion of solutions to problems from past years can be found in the book More Monthly Problem Gems, which I had the pleasure of co-authoring with Hongwei Chen.
Below there is a list of the recent problems I liked the most.


Problem 12606 - M. Ghelichkhani (Iran).

Problem 12605 - A. Desai (India).

Problem 12601 - Tuan Anh Nguyen (Vietnam).

Problem 12597 - L. Giugiuc (Romania).

Problem 12594 - H. Ohtsuka (Japan).

Problem 12593 - R. Nillsen (Australia).

Problem 12587 - R. Tauraso (Italy).

Problem 12583 - A. Quintero (Colombia) and S. Wagon (USA).

Problem 12581 - M. A. Alekseyev (USA).

Problem 12574 - Tuan Anh Nguyen (Vietnam).