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

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?

Can you find out what is missing?

1 3 5
2 4 ?

Hint: It's not six. Think out of the box.

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?

I have branches, but no fruit, trunk or leaves. What am I?

A man in a car saw a Golden Door, Silver Door and a Bronze Door. What door did he open first?

How many times can you subtract the number two from the number fifty?

You are trapped in a room with two doors. One leads to certain death and the other leads to freedom. You don't know which is which.
There are two robots guarding the doors. They will let you choose one door but upon doing so you must go through it.
You can, however, ask one robot one question. The problem is one robot always tells the truth, the other always lies and you don't know which is which.
What is the question you ask?

In the given figure, you can see that four match sticks are used to form a square. Can you form five squares by using six matches?

John walks into the daily grocery shop and steals a $100 bill from the shop. An hour later John returns to the shop and buys some daily products for $40. John pays the owner the $100 bill and therefore the owner returns him $60.

How much money did the owner lose?