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

A bomb exploded in a room full of married couples and no one died. How?

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

What is the largest number you can write with just 3 digits?

I am an eight letter word and I am a computer terminology.
The second, third and fourth letters make an animal.
The fourth, fifth, sixth, seventh and eighth letters make a weapon.
The first, second, third and fourth letters can be taken as an outcome of any exam.
The fifth, sixth, seventh and eighth letter combine to form a high end typing software.

Can you tell who am I ?

What does below rebus means ?

What mathematical symbol can be put between 5 and 9, to get a number bigger than 5 and smaller than 9?

I don't get anymore wetter, no matter how much rain falls on me.

Buy me, smell me or deliver me, I do not change.

Who am I?

How many triangles can you count in the figure given?