If we tell you that there is a relation between the numbers and letters in the given figure, can you analyze it and find the missing letter in the last box?

What's the only room from which no one can enter or leave

Below, you can see three complete equations and one incomplete. Based on the three complete ones, can you complete the incomplete one?

5 $ 4 $ 3 $ 9 = 4215
6 $ 9 $ 2 $ 6 = 3816
4 $ 7 $ 3 $ 3 = 1122
7 $ 2 $ 7 $ 4 = ____

I know a country, If you remove the last alphabet of its name, it will become a part of your body. Do you name it?

What time is it when an elephant sits on a fence?

Two boys were admitted to a school. When the headmaster asks them about their parents, they tell him that they have same parents (father and mother). On further inquiry, it turns out that they both share the same date for their birthday.

"Are you twins," ask the headmaster.
"No," replies the boys.

Is it possible?

What is the longest word in the dictionary?

Why is the longest human nose just 11 inches?

You need to move three matchsticks to form three squares. Can you do it?

A bomb exploded in a room full of married couples and no one died. How?