Yes, 25 is a whole number.
Whole numbers are defined as non-negative integers, which include all the numbers from 0 upwards without any fractions or decimals. This means that whole numbers can be 0, 1, 2, 3, and so on. Since 25 is a non-negative integer without any fractional part, it qualifies as a whole number. In essence, whole numbers encompass all positive integers as well, including 25.