What is more useful when it is broken?

If nine thousand, nine hundred nine dollars is written as $9,909,
how should twelve thousand, twelve hundred twelve dollars be written?

I am not alive, but I grow; I don't have lungs, but I need air; I don't have a mouth, but water kills me. What am I?

How many points are there on the globe where, by walking one mile south, then one mile east and then one mile north, you would reach the place where you started?

An evil man kidnapped someone and made them take one of two pills. One was harmless, but the other was poisonous. Whichever pill the victim took, the kidnapper took the other one. The victim took their pill with water and died. The kidnapper survived. How did the kidnapper get the harmless pill?

Find the missing letter in the last circle logically in the given below picture.

As easy as you can get into me, it is as hard to get out of me.

Do you know what I am?

Which digit occurred maximum times between the number 1 and 1000?

Decode the below four famous ciphers:

8P of the SS
1M of the E
1S of the SS
60M in 1H

Count the squares in the matchstick puzzle below?