How can a man go eight days without sleep?

What is full of holes but still holds water?

Six glasses are in a row. The first three are filled with milk and the last three are empty. By moving only one glass, can you arrange them so that the full and the empty glasses alternate?

In the attached figure, you can see a chessboard and two rooks placed on the chess board. What you have to find is the number of squares that do not contain the rooks. How many are there?

My friends called me Iron59 because my parents are a chemist and a mathematician. What is my real name?

You may enter, but you may not come in. I have space, but no room. I have keys, but open no lock. What am I?

What does this rebus means ?

PROG WORKRESS

I am working in a bus company. The company recently went under expansion and therefore there was not enough room for all the buses. As a result, twelve buses had to be stored outside.

If the company decides to expand the garage space by forty percent, enough space to accommodate the current buses will be created leaving enough space for twelve more buses if the need arises in future.

Can you calculate the number of buses that the company owns at present?

In the given figure, move three matchsticks so that the resulting figure contains two rectangles.

What four weights can be used to balance from 1 to 30 pounds?