Table of contents : Title Contents Distribution of the Problems according to Their Topics Preface Part 1: Key Elements from the Theory Part 2: Statements of the Problems 1. Mathematical Induction and Combinatorics 2. Divisibility 3. Prime Numbers 4. Representations of Numbers 5. Congruences 6. Primality Tests and Factorization Algorithms 7. Integer Parts 8. Arithmetical Functions 9. Solving Equations Involving Arithmetical Functions 10. Special Numbers 11. Diophantine Equations 12. Quadratic Reciprocity 13. Continued Fractions 14. Classification of Real Numbers Part 3: Solutions 1. Mathematical Induction and Combinatorics 2. Divisibility 3. Prime Numbers 4. Representations of Numbers 5. Congruences 6. Primality Tests and Factorization Algorithms 7. Integer Parts 8. Arithmetical Functions 9. Solving Equations Involving Arithmetical Functions 10. Special Numbers 11. Diophantine Equations 12. Quadratic Reciprocity 13. Continued Fractions 14. Classification of Real Numbers Bibliography Subject Index Index of Authors