If you had a pizza with crust thickness 'a' and radius 'z', what's the volume of the pizza?
Which alphabet is a part of our body?
What can you hold in your right hand, but never in your left hand?
Why do Chinese men eat more rice than Japanese men do ?
Why is a river so rich ?
Why did Navjot Singh Sidhu put the new January calendar in the freezer
How can a man go eight days without sleep?
What has lots of eyes, but can’t see?
What part of Turkey has the most feathers?
What do you get if you add 2 to 100 four times?
What is the coolest letter in the alphabet?
In 2007, a puzzle was released and $2 million prizes were offered for the first complete solution. The competition ended at noon on 31 December 2010, with no solution being found. Wiki