Final answer:
The sequence is not arithmetic, and there is no common difference to find.
Step-by-step explanation:
The given sequence is: 2, 4, 8, 16, ...
To determine whether the sequence is arithmetic or not, we need to check if the differences between consecutive terms are the same. Let's calculate the differences:
4 - 2 = 2
8 - 4 = 4
16 - 8 = 8
...
As we can see, the differences are not the same, meaning the sequence is not arithmetic. Therefore, there is no common difference to find.