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

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

I am green and found in the forest and have needles instead of leaves. What am I?
Hint 1: It can be used for Christmas decorations.
Hint 2: I have a strong, scent that is used in air fresheners.

Why is it against the law for a man living in Delhi to be buried in Mumbai?

How can a man go eight days without sleep?

I know a nine-letter word having only one vowel.
Do you ?

In a concert, Christina is performing a dance show with her group.
At 10:00, she and her crew were dancing in an absolutely straight line. At that time Christina was standing in 4th position from both the front and back end of the row.

What was the size of her crew?

Can you convert the number zero(0) into a positive number using just one mathematical operator ?

What kind of band never plays music?

How many runs at maximum can a batsman score in a normal one-day match? Consider the fact that the conditions are ideal and there are no No Balls, no Wide Balls and no Extras in that match.