- Congruence (3 exercices)
- Operations on congruences (4 exercices)
- Congruence operations and problems (4 exercices)
- Congruence and expression (7 exercices)
- Studying the remains of an expression (4 exercices)
- Equations (4 exercices)
- Powers congruent to 0 (3 exercices)
- Cyclic powers (12 exercices)
- Reasoning by recurrence (5 exercices)
- Writing integers in a base (2 exercices)
- Courses (2 exercices)