Why is the longest human nose just 11 inches?

Can you solve below mathematical equation?

2^1234 - 2^1233

This puzzle is for Harry Potter fans. Do you know why Tom Riddle is called Lord Voldemort?

You need to remove two matchsticks to make the below equation true. Can you do it ?

The first person saw the bridge step on it and crossed,
the second person saw the bridge did not step on it but crossed,
the third person did not see the bridge did not step on it but crossed.
Who are these people?

What's the only room from which no one can enter or leave

I can write cow in 13 letters.

Can You?

A mathematics teacher took exams for his students. Out of the total students, 25% passed both the tests included in the exam. However, only 42% were able to clear the first test.

Can you find out the percentage of those students who passed the first test and also passed the second test?

What do you think with the below Picture ?

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?