Hi Manisha,

As we can see that 0 + 3 = 3

Then, 3 + 5 = 8

Then, 8 + 7 = 15

An odd number is added which is next to the previous one.

So, 15 + 9 = 24, 24 + 11 = 35

and so on...............

The series be like 0, 3, 8, 15, 24, 35......................

Feel free to ask doubts in the Comment Section.

I hope this information helps you.

Good Luck!