Can You Solve These Difficult Riddles?

What is black when you buy it, red when you use it, and gray when you throw it away?

What is it that when you take away the whole, you still have some left over?

The 22nd and 24th presidents of the United States of America had the same parents, but were not brothers. How can this be possible?

The answer I give is yes, but what I mean is no. What was the question?

What has four fingers and a thumb, but is not living?

I have keys but no locks. I have a space but no room. You can enter, but can't go outside. What am I?

I can only live where there is light, but I die if the light shines on me. What am I?

What flies when it's born, lies when it's alive, and runs when it's dead?

What word is spelled incorrectly in the dictionary?

Every night I'm told what to do, and each morning I do what I'm told. But I still don't escape your scold.

We hurt without moving. We poison without touching. We bear the truth and the lies. We are not to be judged by our size. What are we?