A man was just doing his job when his suit was torn. Why did he die three minutes later?

I know a nine-letter word having only one vowel.
Do you ?

There is a shop where written:
Buy 1 for $1
10 for $2
100 for $3
I needed 999 and still only paid $3. How could this be financially viable for the shop-keeper?

John and Jill are madly in love with each other. To remind Jill of his pure love, John wants to send her a ring by post but in their country where burglary is quite prominent, any package that is not locked comes under the risk of being stolen for the contents.

John and Jill possess many padlocks but neither one of them has the other key.

Can you find a way John can send the ring to Jill safely?

A prisoner is told: "If you tell a lie, we will hang you and if you tell the truth, we will shoot you." What did the prisoner say to save himself?

What is the riddle which can be asked all day with a different correct answer each time.

Assume there are approximately 5,000,000,000 (5 billion) people on Earth. What would you estimate to be the result, if you multiply together the number of fingers on every person's left hand? (For the purposes of this exercise, thumbs count as fingers, for five fingers per hand.) If you cannot estimate the number then try to guess how long the number would be.

If you’ve got me, you want to share me; if you share me, you haven’t kept me. What am I?

Can you place six matchsticks in a manner that each of the matchsticks is in touch with the other five matchsticks?

You knock a Table over in the library, and suddenly 20 eyes are looking at you.