Problem solving in mathematics and beyond #4

This book is a comprehensive collection of math contest problems along with elegant solutions. It is the perfect training resource for high school math contest and for teachers' use to enrich the standard curriculum. Problems are organized by subject and level of difficulty, along with references to the mathematical formulas and theorems used in the solutions. This book is a rare resource to non-traditional problems to expand the mathematical knowledge of interested and talented students. --

Arithmetic and logic -- Algebra -- Geometry -- Trigonometry -- Logarithms -- Counting -- Number theory -- Probability -- Functional equations