American Mathematical Monthly Problems - 2020

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 several new problems are proposed. Below you can find the solutions that I've submitted this year (pdfs will be available after the deadline). As regards the previous years, you can take a look through the following links (but beware of nerd sniping ): 2019 (41), 2018 (36), 2017 (40), 2016 (50), 2015 (48), 2014 (41), 2013 (29), 2012 (22), 2011 (22), 2010 (15), 2009 (13), 2008 (16), 2007 (15), 2006 (16), 2005 (22), 2004 (13), 2003 (13), 2002 (6), 2001-1993 (19).
For anyone who is interested in sharing hints and solutions, please feel free to contact me at:


Problem 12200 - 07 - I. S. Evren (Turkey).

Problem 12199 - 07 - S. Sharma (India).

Problem 12194 - 06 - M. Tetiva (Romania).

Problem 12193 - 06 - F. Stanescu (Romania).

Problem 12192 - 06 - P. Korus (Hungary).

Problem 12190 - 06 - L. Giugiuc and G. Negutescu (Romania).

Problem 12189 - 06 - H. Katsuura (USA).

Problem 12186 - 05 - A. Eydelzon (USA).

Problem 12184 - 05 - P. Perfetti (Italy).

Problem 12183 - 05 - H. Ohtsuka (Japan).

Problem 12182 - 05 - S. Sharma (India).

Problem 12181 - 05 - G. Apostolopoulos (Greece).

Problem 12180 - 04 - P.F. Refolio (Spain).

Problem 12179 - 04 - N. MacKinnon (UK).

Problem 12178 - 04 - S. Portnoy (USA).

Problem 12175 - 04 - G. Fera (Italy).

Problem 12174 - 04 - G. Galperin (USA) and Y. J. Ionin (USA).

Problem 12173 - 03 - F. Stanescu (Romania).

Problem 12171 - 03 - U. Abel and V. Kushnirevych (Germany).

Problem 12168 - 03 - M. Lukarevski (North Macedonia).

Problem 12167 - 03 - N. MacKinnon (UK).

Problem 12165 - 02 - Tran Quang Hung and Nguyen Minh Ha (Vietnam).

Problem 12163 - 02 - T. Speckhofer (Austria).

Problem 12162 - 02 - Dao Thanh Oai (Vietnam) and L. Giugiuc (Romania).

Problem 12161 - 02 - J. H. Santiago (Mexico).

Problem 12160 - 02 - H. Ohtsuka (Japan) and R. Tauraso (Italy).

Problem 12158 - 01 - H. Grandmontagne (France).

Problem 12156 - 01 - H. Ohtsuka (Japan).

Problem 12154 - 01 - M. Lukarevski (North Macedonia).

Problem 12153 - 01 - O. Kouba (Syria).