Bheja Fry question

 This is a number sequence puzzle. We must find out the next number of the sequence.

Question 

2  ,     6  ,    12 ,   20 ,     30  ,  ???

Answer 

If we look at the numbers , we can come to know that it follows a certain pattern.

That pattern is  ----

6   -   2   =   4

12   -   6   =   6

20    -    12    =    8

30    -    20   =    10

By looking at  above pattern,

The differences go up by  2   each time.

Following the same pattern,  the next difference must be  12   ....

We can write it as ,

30  +    12     =   42

Hence,  completed sequence is .......  

2  ,      6  ,   12  ,   20 ,    30,    42