No one wants to have it, but if one got it, he does not want to lose it. What is It?

When I asked a girl's name she told me her name is the date '07/09/2001'.

I thought for a few seconds and then I got her name. Do you?

I am a type of vehicle that has two wheels and is powered by humans. What am I?
Hint 1: You can ride me for exercise.
Hint 2: I am environment-friendly.

In a competitive exam, each correct answer could win you 10 points and each wrong answer could lose you 5 points. You sat in the exam and answered all the 20 questions, which were given in the exam.
When you checked the result, you scored 125 marks on the test.

Can you calculate how many answers given by you were wrong?

I live in a bowl. I can swim. I have a tail. I also have fins and big eyes. What am I?

I have cities, but no houses. I have mountains, but no trees. I have water, but no fish. What am I?

A woman is sitting in her hotel room and hears a knock at the door. She opens the door to see a man whom she’s never met before. He says, “I’m sorry, I have made a mistake, I thought this was my room.” He then goes down the corridor and into the elevator. The woman goes back into her room and calls security. What made the woman so suspicious of the man?

Find The Next Number in this series.
1, 2, 6, 42, 1806 ?

What is the next shape from answers A, B, C, and D figure?

What is the fastest way to double your money?