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

People make me, save me, change me, raise me. What am I?

An express train takes 3 seconds to enter the tunnel which is 1 km long.
If it is travelling at 120 km an hour, how long will it take to pass completely through the tunnel?

A man was just doing his job when his suit was torn. Why did he die three minutes later?

As a whole I am both
safe and secure.

Behead me and I become
a place of meeting.

Behead me again and I am
the partner of ready.

Restore me, and I become
the domain of beasts.

What am I?

I am sure no one can have two things for dinner. what are they?

A finger goes in me. You fiddle with me when you're bored. The best man always has me first. What am I?

There are nine letters in the below-given diagram. You have to form a nine-letter word using these letters.

Can you count the number of quadrilaterals in the picture below?

Find out a multi-digit number that if multiplied by the number 9 or any of its multiplications products (i.e. 18, 27, 36, 45,..) will result in the multiplication factor repeated (n) number of times.