I am Huge on Sunday and Saturday.
I am small from Tuesday to Thursday.
I do not exist on Monday and Friday.
Who am I?

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?

You enter your friend's room. He is not in his room. Although you see that on the bed there are two dogs, five cats, two giraffes and three pigs. Also, a couple of chickens and ducks are flying in the room.

Calculate the number of legs standing on the floor.

What can run but never walk, have a mouth that never speaks, have a head that never weeps, and have a bed but never sleeps?

What has six faces, but does not wear makeup, has twenty-one eyes, but cannot see?

Begin with a word, five letters to my name,
Remove the first and last but I am the same
Take out my middle and still, I remain.
What word am I?

I have an eye but still cannot see.

Who am I?

If eleven plus two equals one, what does nine plus five equal?

If an electric train is travelling south, then which way is the smoke going?

I don't get anymore wetter, no matter how much rain falls on me.