You knock a Table over in the library, and suddenly 20 eyes are looking at you.

You have a thousand Re. 1 coins with you. You have ten bags with you and you can put any number of coins in each of the bags. The condition is that if someone asks you for any amount between 1 and 1000, you must be able to give that amount by just giving the bag (you are not allowed to open the bag and give coins).

How will you do it?

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 = ____

You can see it everyday, But cannot touch it at will. What is it?

What am I?

What goes through cities and fields, but never moves?

What building has the most stories?

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?

I am white when I am dirty, and black when I am clean. What am I?

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