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

Can you name any English verb that becomes its past tense by simply rearranging the alphabets ?

What word does this rebus represent?

meta meta
meta meta

A man who was outside in the rain without an umbrella or hat didn’t get a single hair on his head wet. Why?

A boy and his father are caught in a traffic accident, and the father dies. Immediately the boy is rushed to a hospital, suffering from injuries. But the attending surgeon at the hospital, upon seeing the boy, says 'I cannot operate. This boy is my son.' How is this situation explained?

1 rabbit saw 9 elephants while going to the river. Every elephant saw 3 monkeys going toward the river. Each monkey had 1 parrot in each hand. How many animals are going towards the river?

ENEMY = 2 * LINK
LINK + 2 = HELL

Then what will be TAXI + HELL? Select from the options below:
a) ROTTEN
b) DANGER
c) HEAVEN
4) MORTAL

What does this mathematical rebus means ?

Place the numbers from 1 to 9 in the circles in a manner that each side of the triangle sums up to 17.

There are nine dots in the picture that has been attached with this question. Can you join all the dots by drawing four straight lines without picking up your pen?