What kind of storm is always in a rush?

Whats the next number in the below number sequence pattern.

In the figure that has been attached to this question, each digit represents a digit. The similar letters carry the same integer value. Can you expose the original digits?

Replace the question mark with the correct number below.

What month of the year has 28 days?

Solve the following series:
AZ, GT, MN, __, YB

A mother is 21 years older than her child. In exactly 6 years from now, the mother will be exactly 5 times as old as the child.
Where's the father?

The person who makes it has no need for it; the person who buys it has no use for it. The person who uses it can neither see nor feel it. What is it?

A B C D E F G H

These are the letters given to you. Now you have to find out the letter that comes two to the right of the letter which is immediately to the left of the letter that comes three to the right of the letter that comes midway between the letter two to the left of the letter C and the letter immediately to the right of the letter F.

I never stop running even when I standstill. If I am formed by joining two identical bodies together, can you guess who I am?