What the mode what series of numbers 4 4 8 8 8 10 10 12 12?

The mode of a series of numbers is the value that appears most frequently. In this case, the number 8 appears three times, which is more frequent than any other number in the series. Therefore, the mode of the series of numbers 4, 4, 8, 8, 8, 10, 10, 12, 12 is 8.