A sound understanding of public international law is indispensable for any lawyer, whether working in an international or domestic context. It is therefore important that students have a thorough theoretical understanding of international law issues, and are able to apply the relevant international legal rules to a given set of facts, so as to arrive at a legally coherent conclusion. This practical aspect of learning international law is often neglected in favor of more theoretical aspects - which is where this book comes in. The book offers a series of hypothetical practical cases in public international law, including some of its specialized branches, such as international human rights law and international criminal law. It challenges students to practice and familiarize themselves with the methodology and to write solutions to practical international legal questions. Divided into two parts, the first section of the book contains practical exam-like questions, organized by subject (such as treaty law or State responsibility) while the second section contains the solutions. Additionally, the book includes a chapter dedicated to more complex "interconnected" cases where students are asked to tackle problems which span multiple potential cases and topics. It will be a useful tool for those seeking a thorough theoretical understanding of public international law.