A boy was at a carnival and went to a booth where a man said to the boy, "If I write your exact weight on this piece of paper then you have to give me $50, but if I cannot, I will pay you $50." The boy looked around and saw no scale so he agrees, thinking no matter what the carny writes he'll just say he weighs more or less. In the end the boy ended up paying the man $50. How did the man win the bet?

You find yourself in a strange place guarded by two guards.One of the guard always say truth while other always lies.You don't know the identity of the two.You can ask only one question to go out from there. What should you ask?

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?

I am a prime number.
The double of myself is equal to the square of me.

which number am I?

I cannot talk, but I always reply when spoken to. What am I?

10+10 and 11+11 can give you the same answer.

Explain how?

I’m light as a feather, yet the strongest person can’t hold me for five minutes. What am I?

If an electric train is travelling south, then which way is the smoke going?

The Little ant seems to be always confused. Do you know why?

When it's bad luck to meet a black cat?