I am quite hot but become too cold if you remove the first two letters. What am I?

In the city of Brain Teasers, 5% of people do not list their phone numbers. Now if we select random 100 people from the phone directory, then how many people selected will have unlisted phone numbers?

A woman lives in a Tall building thirty-six floors high and served by several elevators which stop at each floor going up and down. Each morning she leaves her apartment and goes to one of the elevators. Whichever one she takes is three times more likely to be going up than down. Why?

I am never scared but became petrified and can’t live in a house but would die to make one. What am I?

A woman named Maria was at the funeral of her mother. She met a nice young man that she had never seen before and after the service, they spent a bit of time together. Then she got busy and didn’t get his name or phone number before he left. She tried to find him, but no one knew who he was or how to contact him. A few weeks later, Maria’s older sister dies and the police suspect murder. Who killed the sister?

In the given figure, move three matchsticks so that the resulting figure contains two rectangles.

If in a car race, the man who came two places in front of the last man finished one ahead of the man who came fifth, how many contestants were there?

You’re out on the water and see a boat filled with people. You look away for a second and look back again, but this time you don’t see a single person on the boat. Why? Hint: The boat did not sink.

I look at you, you look at me I raise my right, you raise your left. What am I?

There is a square of a particular number which when doubled, becomes 7 more than its quarter.

Can you find the number?