What is the Mode? The mode is a type of average. One way to remember mode is to think of most. What number appears most in a set of data is the mode. Some sets of data won't have a mode as none of the numbers appear more than once. Some sets of number will have one or more modes. The mode is the most times a number appears in data. Let's say you have class marks out of 10. Those marks are 9, 10, 7, 4, 8, 3, 7, 8, 7, 10, 7. The mode is 7 as it appears the most. Here are 13 worksheets for the mode.