How can you make number one disappear by adding something to it?

Akbar called Birbal and asked him to draw a line on the floor. He asked Birbal to make that line smaller without erasing it. Birbal smiled and did it before Akbar could blink his eyes.

How did he managed to do it?

I can write cow in 13 letters.

Can You?

Why do people go to bed?

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

Why do Chinese men eat more rice than Japanese men do ?

What word is represented by this rebus?

What three numbers, none of which is zero, give the same result whether they’re added or multiplied?

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?

I had an infinite supply of water and 5 litres and 3 litres jars.

How would you measure exactly 4 litres in the least number of steps?