Exploring Mathematical Concepts: From the Golden Ratio to Prime Numbers and π. A fascinating journey through the secrets and applications of mathematics. The Golden Ratio, a centuries-old measure of harmony, is explored in both science and art. From the mathematical foundations to their creative expressions, such as in the shapes of triangles to credit cards, this book reveals the versatility of this ratio. We encounter prime numbers as early as our first school years. Despite the myth, they are not as complex as they seem. To understand what prime numbers are, we only need to know a number system and be able to perform the four basic arithmetic operations. Nevertheless, prime numbers represent one of the most fascinating challenges in the history of science. Anyone interested in mathematics will undoubtedly encounter them and be captivated by them. The influence of prime numbers extends beyond mathematics; they have quietly established themselves in various areas of our daily lives, such as securing computers, bank transfers, and even safe mobile phone calls. π, the mysterious number celebrated annually on March 14, has fascinated people for centuries. From Archimedes to modern records in calculating its decimal places, the hunt for it is an ongoing race that continually surprises us. Whether it involves practical applications in geometric formulas or the deep philosophical questions it raises about infinity, π remains an eternal fascination for both scholars and math enthusiasts.