If you had a pizza with crust thickness 'a' and radius 'z', what's the volume of the pizza?

How far can you walk into the woods?

Can you name an animal whose killing cannot be performed without spilling your own blood?

I am sure no one can have two things for dinner. what are they?

I can be made.
I can be cracked.
I can be told.
I can be played.

Who am I?

how come the second man dies?

Consider this: Arnold Schwarzenegger has a big one. Michael J. Fox has a small one. Prince doesn’t have one. The Pope has one but never uses it. Bill Clinton has one and uses it all the time. What is it?

There are forty elephants and they have forty-fore heads. How can this be possible?

I am a type of word that is spelt incorrectly or used differently, on purpose for humour. What am I?
Hint 1: You can find me in a joke.
Hint 2: I am a play on words.

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?