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

A sea diver is a real show-off. He showed everyone that he can hold his breath underwater for 15 minutes.

I went to the diver and told him that I can be underwater for double the time i.e 30 minutes.
He responded that he will give me 100$ if I would be able to do it. I won 100$.

What did I do?

What goes up but never comes down?

By removing one matchstick and adding one matchstick, can you convert the word "ZOO" to an animal name?

In a fruit store, there was a unique weighing machine that was made to weigh only cherries and strawberries as they were priced the same.

Other fruits like watermelons or mango had different machines as they were expensive.

A man successfully buys watermelons at the price of cherries. How?

There is a square piece of paper with a hole that is denoted by the circle on the top right side in the given picture. You have to cut the paper in a manner that it forms two and only two separate pieces of paper and then rearrange the pieces in a manner that the holes come in the centre of the paper.

My friends called me Iron59 because my parents are a chemist and a mathematician. What is my real name?

Which alphabet letter is a question?

If,

6 / 7 = 2
3 / 9 = 7
8 / 2 = 6

Then

4 / 5 = ?

There's one "sport" in which neither the spectators nor the participants know the score or the leader until the contest ends.

What is it?