Elementary Theory of Numbers

"This book provides a nice selection of topics for a short introductory course in elementary number theory. The theorems are basically standard, with standard proofs. There is an abundant collection of exercises, with solutions or hints included." Mathematical Reviews, 1994 "The book exposes the elementary basic theory of numbers and methods of calculations, so that it may be used as a textbook for undergraduate students. There are many examples and exercises in this book, the answers of the exercises can also be found." Mathematics Abstracts