Bay of Bengal is in which state?

Can you think of a smallest +ve number such that if we shuffle the digits of the number, the new number becomes double the original number?

I am written with two letters.
I said with the one.
I usually am seen with the two.

Who am I?

What is the value of 1/2 of 2/3 of 3/4 of 4/5 of 5/6 of 6/7 of 7/8 of 8/9 of 9/10 of 1000?

You can hear me, but you can't touch or see me.

What am I?

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

What is the word or phrase?

Nine marbles are arranged in the image below. Can you slide two marbles to form a square?

You walk into a creepy house by yourself. There is no electricity, plumbing, or ventilation. Inside you notice 3 doors with numbers on them. Once you open the doors you will die a particular way. Door No.1 You’ll be eaten by a lion who is hungry. Door No.2 You’ll be stabbed to death. Door No.3 There is an electric chair waiting for you. Which door do you pick?

You are an expert on paranormal activity and have been hired to locate a spirit haunting an old resort hotel. Strong signs indicate that the spirit lies behind one of four doors. The inscriptions on each door read as follows:

Door A: It's behind B or C
Door B: Its behind A or D
Door C: It's in here
Door D: It's not in here

Your psychic powers have told you three of the inscriptions are false, and one is true. Behind which door will you find the spirit?