If u do these riddles and get them right i will mark u as brainlest

1. who makes it, has no need of it
who buys it, but has no use for it
who uses it can neither see nor feel it
what is it?

2. what can travel the world while staying in a corner?

3. what belongs to you but others use it more?

4. a man wants to enter an exclusive club, but he doesn't know the password. another man walks to the door and the doorman says 12, the man says 6, and is let in. another man walks up and the doorman says 6, the man says 3, and is let in. thinking he had heard enough, he walks up to the door and the doorman says 10, he says 5, and he isn't let in. what should he have said?

5. what travels alone but is never alone, has a name but doesn’t exist

6. a woman is sitting in her hotel room when there is a knock at the door. she opened the door to see a man whom she had never seen before. he said "oh i'm sorry, i have made a mistake, i thought this was my room." he then went down the corridor and in the elevator. the woman went back into her room and phoned security. what made the woman so suspicious of the man?