What speaks without a mouth, has knowledge without a brain and teaches with no degree?

Until I am measured, I am not known. Yet how you miss me when I have flown. What am I?

A certain crime is punishable if attempted but not punishable if committed. What is it?

If I have it, I don’t share it. If I share it, I don’t have it. What is it?

You use me from your head to your toes. The more I work, the thinner I grow. What am I?

I’m where yesterday follows today, and tomorrow’s in the middle. What am I?

Almost everyone needs it, asks for it, gives it, but almost nobody takes it. What is it?

Who are the two brothers who live on opposite sides of the road yet never see each other?

If you know me then I am nothing, but if you don’t, then I am something. What am I?

Under pressure is the only way I work, and by myself is the only way I am hurt. What am I?

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

Although I’m far from the point, I don’t make mistakes, I fix yours. What am I?

I am partly blind but can still see. I have legs but only use them for sleeping. What am I?

What is the only word in the English language that has 6 letters, all in alphabetical order?

I am used to bat with, yet I never get a hit. I am near a ball, yet never thrown. What am I?