A doctor and a boy were fishing. The boy was the doctor’s son, but the doctor was not the boy’s father. Who was the doctor?

What is next number in the pattern below:

131 517 192 123 ?

Spot what is wrong here in below Picture?

Buy me, smell me or deliver me, I do not change.

Who am I?

I know a ten-letter word in the English language which can be typed using only the top rows of the computer keyboard.

I am a type of word that is spelt incorrectly or used differently, on purpose for humour. What am I?
Hint 1: You can find me in a joke.
Hint 2: I am a play on words.

A kind heart person buy packed food at 3$/packet from United states and sells them at 1$/packet at Africa. After some time he becomes a millionaire.

How come the guy become millionaire ?

A journalist was investigating a sacred cult in the jungles of Africa when he was caught by one of the person. He was confined in a cave till the leader arrived. The leader told him that he need to tell him a statement. If he thinks the statement is true, then the journalist head will be chopped off. If he thinks that the statement is false, his head will be smashed with a hammer.

What statement did the journalist make to survive?

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

What has six faces, but does not wear makeup, has twenty-one eyes, but cannot see?