Publisher's Synopsis
The book follows almost the same line of the lectures of the level one number theory course taught by the second author at the AwesomeMath Summer program (AMSP) combined with the vast problem-solving experience and style of the first author. The book contains many examples, proposed problems followed by solutions, and a selection from many recent mathematical contests and Olympiads, journals, as well as tests given to students during recent years at AMSP.