Find the term that completes the series.
$$\text{AD2, CF6, EH12, GJ20, IL30, \_\_\_\_.}$$

Let's break down the alphanumeric alphanumeric series into its individual components:
1. First Letter Progression:

$$\text{A}\stackrel{+2}{\to }\text{C}\stackrel{+2}{\to }\text{E}\stackrel{+2}{\to }\text{G}\stackrel{+2}{\to }\text{I}\stackrel{+2}{\to }\mathbf{K}$$

The first letters increase by $2$ steps. The next letter after $\text{I}$ is $\text{K}$.
2. Second Letter Progression:

$$\text{D}\stackrel{+2}{\to }\text{F}\stackrel{+2}{\to }\text{H}\stackrel{+2}{\to }\text{J}\stackrel{+2}{\to }\text{L}\stackrel{+2}{\to }\mathbf{N}$$

The second letters also increase by $2$ steps. The next letter after $\text{L}$ is $\text{N}$.
3. Number Progression:
The numbers are $2,6,12,20,30$. Let's look at the successive differences:
* $6-2=4$
* $12-6=6$
* $20-12=8$
* $30-20=10$

The differences form a series: $+4,+6,+8,+10$. The next difference must be $+12$.

$$\text{Next number}=30+12=42$$

Combining all components together gives KN42.