During which month do people sleep the least?

When does a USA Potato change its nationality?

If 1+9+8=1, what is 2+8+9?

There are a number of books on a shelf. If one book is the 4th from the left and 6th from the right, how many books are on the shelf?

What can go up a chimney down, but can’t go down a chimney up?

I never was there, I am always to be.
You have never ever seen me, not ever you will.
Yet I am the confidence of everyone.

Who Am I?

No one wants to have it, but if one got it, he does not want to lose it. What is It?

Suppose we lay down two cups in front of you. One of the cups is filled with tea and the other one with coffee. Now we ask you to take a spoonful of tea and mix it with the coffee. At this moment, the coffee cup has a mixture of tea and coffee. You have to take that mixture (spoonful) and add it back to the tea.

Can you now tell if the cup of coffee has more tea or the cup of tea has more coffee?

Luis Garavito killed Density x Volume.

Who is Luis Garavito ?

I have lakes with no water, mountains with no stone and cities with no buildings. What am I?