How is the moon similar to a dollar?

John drives to his office at 20km/hr. After reaching the office, he realizes that today is a holiday. He went back at an average speed of 30km/hr. Discounting the time spent in the stoppage what was the average speed of his journey?

I make a loud sound when I’m changing. When I do change, I get bigger but weigh less. What am I?

The peacock is a bird that does not lay eggs. How do they get baby peacocks?

Outside a tattoo artist's shop, there was a signboard which read 'I make tattoos on only them who do not tattoo themselves'.

Reading it what do you think, does the tattoo artist tattoo himself?

Keyboard words are not in alphabetical order, Why?

You can take four of the five letters out of this word, but the pronunciation never changes. What is the word?

What do you see in the image below

A boy and his father are caught in a traffic accident, and the father dies. Immediately the boy is rushed to a hospital, suffering from injuries. But the attending surgeon at the hospital, upon seeing the boy, says 'I cannot operate. This boy is my son.' How is this situation explained?

What two things can you never eat for breakfast?