What always comes into a house through the keyhole?

Can you find out the number that should replace the question mark with a valid reason?

When it is alive we sing, when it is dead we clap our hands. What is it?

How many triangles can you count in the figure given?

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

If two's company, and three's a crowd, then whats four and five ?

What number should come in place of the question mark below?

What's the best place to go shopping in the ocean?

There’s a girl who has a large family. She has an equal amount of brothers and sisters, but each brother only has half as many brothers and sisters. What’s the correct amount of brothers and sisters?

Once while in his court, King Akbar asked Birbal to write something on a wall that makes one sad when read in good times and makes one happy when read in sad times.

He took only a few moment and wrote something that fit the requirements. What did he write?