What is the square of 5?

To determine the square of a number, you multiply that number by itself. In this case, the number is 5. So, the calculation is 5 multiplied by 5.

5 × 5 = 25

Thus, the square of 5 is 25, which matches the correct answer. Understanding the concept of squaring a number is fundamental in arithmetic, as it establishes the relationship between multiplication and exponentiation; squaring specifically refers to raising a number to the power of two. This concept is commonly used in various mathematical contexts, and recognizing that the square of 5 is 25 is a key part of mastering basic arithmetic operations.