If you drop a 15 kg iron bar and a 5 kg bag of cotton from a height of 50 meters which will reach the ground first?

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

Here is what you have to do. You have to throw a ball as hard as you can but it must return back to you even if it does not bounce at anything. Also, you have nothing attached to the ball. There is no one on the other end to catch that ball and throw it back at you.

How will you do it?

There is a brick of gold and a brick of iron in a boat (both 10-inch blocks), if they are both dropped into the water which will make the water level higher?

Cristina was born in 1888. She just had her 30th birthday today how did that happen?

Rebus Puzzle Definition: A rebus is an illusion device that uses pictures to represent words or parts of words.
What does This Rebus Puzzle Identify?

What is the largest amount of money that you can possess in change and still if someone asks you for a dollar, you won't be able to give?

A blonde put eyeliner on her head. Why?

In The 1st month of this year(the year 2013), I noticed that the date 13-1-13 (13 January 2013) is special.

This date is special as:

Date * Month = Year.

Can you figure out which year of this century has a maximum number of such dates?

John killed hundreds of people mercilessly and yet the police were not able to put her behind the bars. Why?