Count the number of lines in the image below ?

Can you name some countries which do not have the alphabet 'A' in them?

Why is a river so rich ?

Below, you will find the mathematical proof that 10 equals 9.99999?. But is that possible or there is something wrong about it? Can you find the error?

x = 9.999999...
10x = 99.999999...
10x - x = 90
9x = 90
x = 10

A man calls his dog from the opposite side of a river. The dog crosses the river without a bridge or a boat and manages to not get wet. How is this possible?

If eleven plus two equals one, what does nine plus five equal?

What number when divided in half becomes zero?

You walk into a room that contains a match, a kerosene lamp, a candle and a fireplace. What would you light first?

You need to climb ten stairs. At every stair, you can either take one step up or you can jump two steps up.

In how many different ways you can climb 10 stairs?

I cry without having a voice.
I fly without having wings.
I bite without having teeth.
I whisper without a mouth.

Who am I?