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

I have an eye but still cannot see.

Who am I?

How can you make number one disappear by adding something to it?

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

My location can be determined by the below rebus.
So where am i ?

What word is identified by the below rebus?

Your Your Your Your Your
Your Your Your Your Your

In four steps you need to move the word 'cold' From 'warm' by replacing one alphabet at a time such that every word formed at each step is acceptable in English Dictionary.

In a school, 280 students studied chemistry, 254 students studied physics and 280 students studied biology.

97 students studied chemistry as well as physics, 138 students studied physics as well as biology and 152 students studied chemistry as well as biology.

73 students studied all the three branches.

Can you find out the total number of students?

What is wrong in the below Picture?

There were five men at church, and it started raining while they were outside. The four that ran still got wet, but the one that was still stayed completely dry. Why did he stay dry?