There is one thing that goes round the house and also inside the house but never even share a brief touch. What is it?

Two boys wish to cross a river. The only way to get to the other side is by boat, but that boat can only take one boy at a time. The boat cannot return on its own, there are no ropes or similar tricks, yet both boys manage to cross using the boat.

How?

No matter how little or how much you use me, you change me every month. What am I?

I throw two dice simultaneously.

What is the probability of getting a sum as 9 of the two numbers shown?

During an interview, the interviewer ordered hot coffee for the candidate to relieve the stress. The coffee was kept before him. After a minute, the interviewer asked him, 'What is before you?' He replied 'Tea'.

The candidate was selected immediately. Why?

A bomb goes off.
Carnage.
One person, only a few feet away, survives! How can this be?

What is the largest amount of money that you can possess in change and still if someone asks you for a dollar, you won't be able to give?

A man was going to bleach his socks because they had gotten muddy the day before. As he was pouring the bleach into the washing machine, he spilt some on the floor. He got some cleaning fluid and mopped it up with a rag. Minutes later he was dead. What killed him?

I am a word of 12 alphabets.

* Alphabets 12, 4, 7, 2, 5 : Eastern beast of burden
* Alphabets 1, 8, 10, 9 are street made famous by Sinclair Lewis.
* Alphabets 11, 3, 6 are past.

On whole it means a person suffering from delusions of greatness.

What Is it ?

You need to arrange three 7 and mathematical symbols to form number 1?