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

You have four chains. Each chain has three links in it. Although it is difficult to cut the links, you wish to make a single loop with all 12 links. What is the fewest number of cuts you must make to accomplish this task?

Can you name an animal whose killing cannot be performed without spilling your own blood?

Suppose that you are trapped on the surface of a frozen lake. The surface is so smooth and ideal that there is no friction at all. You cant make any grip on the ice and no wind is blowing to help you out. You have just a mobile phone with you which has got no reception disabling you to call for help.

How will you plan your escape before you freeze to death on the frozen lake?

Can you spot the hidden girl in the picture below?

What is the coolest letter in the alphabet?

When I get multiplied by any number, the sum of the figures in the product is always me. What am I?

How can a man go eight days without sleep?

I am never scared but became petrified and can’t live in a house but would die to make one. What am I?

A boy was locked in a room by some robbers. All that is in the room is a piano, a calendar, and a bed. The room is locked from the outside. What does he eat, drink, and how does he escape and get out?