The more of this there is, the less you see. What is it?

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

What always comes into a house through the keyhole?

1. How can we put an elephant in the refrigerator?
2. How can we put a Giraffe in a refrigerator?
3. The king of the jungle invites all the animals to a party everyone comes except for one animal, which animal?
4. You come to a crocodile-infested lake, you can't go around it, you can't co under it and you can't go over it, how do you get across?

Solve The below Equation:

ALFA + BETA + GAMA = DELTA

Mother's Name is Mrs. SIXTY TWO
Son's Name is FIFTY TWO
Daughter's Name is FORTY TWO
What is Name of Father?

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

What number divided by 4 is the same as that number minus 4?

I am sometimes honest
Sometimes dishonest
I can be sweet and also bitter
I can hurt you real bad and
also make u smile and blush ☺️
What am I?

There was an aeroplane crash, every single person died, but two people survived. How is this possible?