This book serves as a companion to Group Theory in Physics by Wu-Ki Tung; It consists entirely of solutions to the problems at the end of each chapter. However, this does not mean that the student of Group Theory who can work all these problems out has nothing to benefit by browsing through this book. Many problems are worked out in such a way as to present material that is not accessible in Group Theory in Physics, or point out connections of this subject to other branches of Physics that are too trivial to include in treatise on the subject, but far from obvious to the beginner.