Numerical representation refers to the way numbers are expressed in different forms, such as digits, words, or symbols. For example, the number 5 can be written as "five" in words or represented as "V" in Roman numerals. This concept is essential in mathematics and everyday life, as it helps us understand and communicate quantities effectively. Different systems of numerical representation exist, including binary, decimal, and hexadecimal. The decimal system, which uses ten digits (0-9), is the most common in daily use. In contrast, the binary system, which uses only two digits (0 and 1), is crucial in computer science, as it forms the basis of digital data processing.