What is the difference between the highest digit and the lowest digit in the series?

Observe the given digit series carefully and answer the questions based on it.

6 8 4 9 3 4 8 9 5 9 2 7 6 1 8 4 3 9 2 5

The correct option is 8.

Step-by-step Explanation:

Step 1: Identify all digits given in the series.
The given digit series is:
6, 8, 4, 9, 3, 4, 8, 9, 5, 9, 2, 7, 6, 1, 8, 4, 3, 9, 2, 5

Step 2: Find the highest digit in the series.
By looking at all the numbers in the series, the largest/highest digit present is 9.

Step 3: Find the lowest digit in the series.
Looking at all the numbers in the series, the smallest/lowest digit present is 1.

Step 4: Calculate the difference between the highest digit and the lowest digit.
Difference = Highest digit - Lowest digit

$\text{Difference}=9-1=8$

Thus, the difference between the highest digit and the lowest digit in the series is 8.