Can you find the missing piece of the Porsche?

How many letters are in the alphabet?

Count The number of F's in the paragraph below:

"FINISHED FILES ARE THE RESULT OF YEARS OF SCIENTIFIC STUDY COMBINED WITH THE EXPERIENCE OF YEARS"

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?

How many sides does a circle have?

Twenty frogs are sitting on a log floating on the surface of a river. Two of them decide to jump off into the water.

How many frogs are there on the log at this moment?

I am taken from a mine and shut up in a wooden case, from which I am never released, and yet I am used by almost every person. What am I?

I’m orange, I wear a green hat and I sound like a parrot. What am I?

I’m light as a feather, yet the strongest person can’t hold me for five minutes. What am I?

The dirtier I get, the whiter I look. Who am I?