What does this below rebus puzzle mean?

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

Whats the next number in the below number sequence pattern.

Which word is least like the others? Third, fourth, fifth, sixth, seventh, eighth, ninth?

Can you identify the hidden rebus in the image below?

What goes up but never comes down?

10 people came into a hotel with 9 rooms and each guest wanted his own room. The bellboy solved this problem.
He asked the tenth guest to wait for a little with the first guest in room number 1. So in the first room, there were two people. The bellboy took the third guest to room number 2, the fourth to number 3, ..., and the ninth guest to room number 8. Then he returned to room number 1 and took the tenth guest to room number 9, still vacant.
How can everybody have his own room?

That attorney is my brother, testified the accountant.

But the attorney testified he didn't have a brother.

Who is lying?

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

What does the following represent?

N N N N N N N

A A A A A A A

C C C C C C C