I make two people out of one. What am I?

Here is a mathematical expression that also secretly tells a movie name. What movie is that?

What is the riddle which can be asked all day with a different correct answer each time.

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

No one wants to have it, but if one got it, he does not want to lose it. What is It?

Ten coins have been arranged as you can see in the given picture. In this arrangement, a triangle is formed pointing upwards. You have to invert the position of the triangle and make it point downwards while changing the position of 3 coins only. Can you do it?

John went to a parrot shop in Mexico, and the parrot owner told him that his parrot is so unique that he repeats everything he hears. John got excited and immediately bought the parrot. John went home and spoke many words, but the parrot does not repeat anything.
He went again to the parrot shop and complaint to the shopkeeper, but the shopkeeper never lied. Explain?

Chef Andrea has to light the kitchen stoves to open her restaurant for the day. There are three stoves in the kitchen: A glass stove, a brick stove, and a wood stove. She only has one match. Which does she light up first?

I am a seven-letter word but if you remove four of my letters I will have one left. What word am I?

How many times do a clock's hands overlap in a day ?