Simple riddles

I am a nut with a whole. What am I?

How can you leave a room with two legs and return with six legs?

You can hold it without seeing or touching it! What is that?

It is just something that everybody does at the same time. What is that?

In a new Engineering Hostels they have 100 rooms. Ankit Garg was hired to paint the numbers 1 to 100 on the doors. How many times will Ankit have to paint the number eight ?

Beth's mother has three daughters. One is called Lara, the other one is Sara. What is the name of the third daughter?

I hiss. I can be poisonous. I am long. I have a forked tongue. What am I?

It can fill a room without occupying space. What is that?

All about, but cannot be seen. Can be captured, but cannot be held. No throat, but can be heard. What is it?

I am alive without breath and cold as death. I am never thirsty but always drinking. What am I?