What is 13 10 in a mixed number?

The expression "13 10" is not a standard way to represent a mixed number. If it's intended as an improper fraction, such as 13/10, then to convert it to a mixed number, you divide 13 by 10. This gives a quotient of 1 and a remainder of 3. Therefore, 13/10 as a mixed number is 1 and 3/10.