Base Eleven is a numeral system that uses eleven distinct symbols to represent values. In this system, the digits range from 0 to 10, where the digit '10' represents the value of ten. Base Eleven is not commonly used in everyday mathematics but can be useful in certain theoretical applications and computer science. In Base Eleven, each position in a number represents a power of eleven, similar to how Base Ten uses powers of ten. For example, the number 21 in Base Eleven would be calculated as 2 × 11^1 + 1 × 11^0, which equals 23 in Base Ten.