Can you find a number that lies one third of the distance between 1/3 and 2/3?

I make a loud sound when I’m changing. When I do change, I get bigger but weigh less. What am I?

Imagine you are in a room with no windows or doors. How will you get out?

Quickly Solve this riddle

7 - 4 + 3 * 0 + 1 = ?

There is an exact a week gap between Christmas and New Year. Hence, It is obvious that the new year that comes right after Christmas comes on the same day of the week.

A Strange thing happened in the Year 1777. Christmas occurs on Wednesday and New Year on Monday. How is that possible?

There are 2 cops parked along a one-way street looking for traffic violations. They spot a taxi driver going in the wrong direction, yet they do nothing.

Why?

John is asked to stand behind Jacob and Jacob is asked to stand behind John. Both of them feel confused about it and don't know what to do?

But it is quite possible, do you know how?

When you say goodbye, I am what you need to tie.
I come as a couple and go wherever you run.
Who am I?

Forwards I am heavy, backward I am not. What am I?

A girl was sitting in her hotel room when she heard a knock on the door. She opened the door and found that a man was standing outside.
The man said, "Oh! I am really sorry, I thought this was my room."
He then walked through the corridor to the elevator. The girl did not know the man. She closed her door and called security asking them to apprehend the man.
What made her suspicious of that man? He might have been genuinely mistaken.