1. The problem is to understand and work with the number 2. 2. The number 2 is a basic integer, an even number, and the smallest prime number. 3. It can be used in various mathematical operations such as addition, subtraction, multiplication, and division. 4. For example, multiplying 2 by itself gives $2 \times 2 = 4$. 5. Adding 2 to another number increases that number by 2, e.g., $3 + 2 = 5$. 6. The number 2 is fundamental in binary systems, where it represents the base. 7. In summary, 2 is a simple yet important number in mathematics.