If there are fifteen crows on a fence and the farmer shoots a third of them, how many crows are left?

Which Burger Is Different in below image?

You may enter, but you may not come in. I have space, but no room. I have keys, but open no lock. What am I?

Two men play a dice game involving roll of two standard dice. Man X says that a 12 will be rolled first. Man Y says that two consecutive 7s will be rolled first. The men keep rolling until one of them wins.

What is the probability that X will win ?

What does an Island and the letter T have in common?

I am a three digit number.
My tens digit is five more than my ones digit.
My hundreds digit is eight less than my tens digit.
What number am I?

John was visiting his friend Jacob. He found out that his friend's wife had just killed a burglar in self-defense.
John asks Jacob about what happened and he told that "His wife was watching television when suddenly the bell rang. She thought that it is her husband Jacob but she found the burglar who attacked her instantly and she got so frightened that she killed the burglar immediately with the knife.
John asked the police to arrest his friend's wife. Why?

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

which number am I?

Three doctors said that Bill was their brother. Bill says he has no brothers. How many brothers does Bill actually have?

What is so fragile that saying its name breaks it?