I have two coins.
* One of the coins is a faulty coin having a tail on both sides of it.
* The other coin is a perfect coin (heads on side and tail on other).

I blindfold myself and pick a coin and put the coin on the table. The face of the coin towards the sky is the tail.

What is the probability that another side is also tail?

A man is approaching a broad and barren land. He has a package with him. If somehow, he is unable to open the package before reaching the land, he will die.

Can you guess what is present in the package?

How many cubic feet of dirt are in a hole of one foot deep, three feet long, and two feet wide?

You are in a land where thirty men and two women were dressed in classic black and white dresses.
They begin to fight as soon as any of them move.

Where are you?

Can you start the fire using two pieces of wood?

There is a square of a particular number which when doubled, becomes 7 more than its quarter.

Can you find the number?

Luis Garavito killed Density x Volume.

Who is Luis Garavito ?

There are people and strange monkeys on this island, and you can not tell who is who (Edit: until you understand what they said - see below). They speak either only the truth or only lies.
Who are the following two guys?
A: B is a lying monkey. I am human.
B: A is telling the truth.

Something Extraordinary happened on May 6th 19778 at 12:34am what was that?

What can you see in the middle of March and April that you can never see in any other month?