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

Name the three-letter word that can complete the below words?

A) L O _ _ _ E
B) E D U _ _ _ E
C) _ _ _ E R
D) _ _ _ T L E

John: "Hi Teacher, What is your favourite movie ?".
Chemistry Teacher: "Indium Cerium Platinum Iodine Oxygen Nitrogen".
Ten seconds later... John replied I got it.

Do you?

Can you complete the sequence?

192, 021, 222, 324, 252, 627, 2__, 9__?

Make eight squares by moving only two matchsticks.
Note- Square can be of different sizes.

What number do you get when you multiply all of the numbers on a telephone's number pad?

What has to be broken before you can use it?

Baseball bat and ball cost $100. If the bat cost $99 more than the ball, what is the cost of each?

I have eight fingers and two thumbs but I do not live. What Am I?

How old is your son? asked a man to his neighbour. My son is five times as old as my daughter and my wife is five times as old as my son. I am twice as old as my wife whereas my grandmother, who is celebrating her eighty-first birthday is as old as all of us put together.

How old is the man's son ?