The mode is the value that appears most frequently in a data set. To find it, you can follow these steps:

1. Arrange the numbers in the data set in ascending or descending order (this makes it easier to count).
2. Count how many times each number appears.
3. The number that occurs the most is the mode.

The mode can be a single value (unimodal), multiple values if two or more numbers tie for the highest frequency (bimodal, trimodal, or multimodal), or no mode if all numbers appear with the same frequency. For example, in the data set , the mode is 5 because it appears more often than any other number.

Mode can also apply to non-numerical data like colors or categories. If using a computer program like Excel, you can use the MODE function to find it quickly. This method works for both numerical and categorical data sets.