There is an English word that can be used up to four times in a row without modifying the spelling and form a valid grammatical sentence.

Do you know what word is that?

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

Give it food and it will live; give it water and it will die.

I am never scared but became petrified and can’t live in a house but would die to make one. What am I?

Can you find the missing piece of the Porsche?

Double it and multiply it by 4. Then divide it by 8 and you’ll have it once more. What number is it?

Two friends decide to get together; so they start riding bikes towards each other. They plan to meet halfway. Each is riding at 6 MPH. They live 36 miles apart. One of them has a pet carrier pigeon and it starts flying the instant the friends start traveling. The pigeon flies back and forth at 18 MPH between the 2 friends until the friends meet.

How many miles does the pigeon travel?

What are the next two letters in the following series and why?
W A T N T L I T F S _ _

*Hint: Check Puzzle Title

I got a bee but no honey.
got an eye but am still blind.
got a sea but no water.
got a tea but no coffee.
got a why but no answer.

What Am I?

The person who makes it has no need for it. He who purchases it does not use it. The person who does use it does not know they are. What is it?