Have No Face
I turn my head and you may go where you want.
I turn it again, you will stay till you rot.
I have no face, but I live or die,
By my crooked teeth.
What am I?
A key
I Am Worthless
I am worthless, yet when added to others I add worth.
I confounded the ancient Greeks, yet I changed men’s understanding.
What am I?
0 (Zero).
Zero is nothing, yet when you add zeroes to a number like 1, it becomes 10, 100 or 1,000.
The ancient Greeks did not have a name for zero and did not use a placeholder. They seemed unsure about the status of zero as a number, philosophizing about how nothing could be something. Once zero was added, it allowed for more mathematical understanding.
A Voice With No Mouth
I am a voice without a mouth, throat or lungs. I know no language but speak in all tongues. What am I?
An echo.
If You Look You Cannot See Me
If you look you cannot see me. If you see me you cannot see anything else. I can make anything you want happen, but later everything goes back to normal.
What am I?
Your imagination.
Same Forward, Backward and Upside Down
What word is the same written forward, backward and upside down?
NOON. The word needs to be a palindrome and made up of only these letters that look the same upside down:
H I N O S X Z
For instance, SOON doesn’t work, because even though each letter looks the same upside down, it reads NOOS.
A Mile From End To End
A mile from end to end, yet as close to as a friend. A precious commodity, freely given. Seen on the dead and on the living. Found on the rich, poor, short and tall, but shared among children most of all. What is it?
A smile.
The Worse It Is, The Better It Becomes
Three little letters
A paradox to some.
The worse that it is
The better it becomes.
A pun.
A Human with Five Hands
How can a human have five hands?
In addition to the two hands on the end of their arms, they also have three hands of cards. Another alternative could be handwriting, of which most people have one, but that could be added into the mix.