This is a simple addition series,

Correct Option: B

This is a simple addition series, which begins with 2 and adds 6.

This is an alternating subtraction series with the interpolation of a random number, 5, as every third number.

Correct Option: A

This is an alternating subtraction series with the interpolation of a random number, 5, as every third number. In the subtraction series, 3 is subtracted, then 4, then 3, and so on.

Here, every other number follows a different pattern. In the first series, 6 is added to each number to arrive at the next.

Correct Option: C

Here, every other number follows a different pattern. In the first series, 6 is added to each number to arrive at the next. In the second series, 10 is added to each number to arrive at the next.

This is an alternating addition series,

Correct Option: E

This is an alternating addition series, in which 10 is added, then 5, then 10, and so on.

This is a simple addition series with a random number, 18, interpolated as every third number.

Correct Option: D

This is a simple addition series with a random number, 18, interpolated as every third number. In the series, 4 is added to each number except 18, to arrive at the next number.