What has to be broken before you can use it?

I am the one who remains awake when you sleep. But I need to rest when you awake. Who Am I?

What begins with T, ends with T, and has T in it?

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?

A mile-long train is moving at sixty miles an hour when it reaches a mile-long tunnel. How long does it take the entire train to pass through the tunnel?

Can you replace the X (both small and big x) with the numbers between 1 to 19 such that all the rows of 3 numbers between X (big x) sum to 23?

You walk into a room where there are three primates held in their respective cages:
1) A lion who is eating the flesh of a goat.
2) An orangutan who is playing with blocks.
3) A donkey who is sitting idle.

Who is the most intelligent primate in the room?

Keyboard words are not in alphabetical order, Why?

What is at the end of a rainbow?

You see a mathematical expression in the picture. Can you think of a movie that this expression refers to?