If a wheel has 54 spokes, how many spaces are there between the spokes?

Rob is taller than Edwin, and Jurgen is shorter than Rob.
Of only one of the following statements, we now certainly know it is correct:

A.Edwin is taller than Jurgen
B.Jurgen is taller than Edwin
C.It cannot be determined if Jurgen or Edwin is the tallest.

What does this Rebus Picture means ?

A bag contains 64 balls of eight different colours. There are eight of each colour (including red). What is the least number you would have to pick, without looking, to be sure of selecting 3 red balls?

Three ants are going up a hill, one behind the other. The last ant then says to the other ants, 'There is an ant behind me!'' How come?

A man was gazing through the window of the 23rd floor of the building. He suddenly opened the window and jumped on the other side of the window. On landing on the floor, there was not a sheer mark of injury on him.

How can that be possible if he did not use any kind of parachute and did not land on a soft surface?

John left on a horse on Thursday , was gone for two days, and came back on Thursday after completing his work. How did that happen?

When it is alive we sing, when it is dead we clap our hands. What is it?

A plane crashed between the border of Mexico and America. Where do you bury the survivors?

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?