What always comes into a house through the keyhole?

What Adam and Eve do not have but the rest of the people have?

You see me once in June, twice in November, and not at all in May. What am I?

If 1+9+8=1, what is 2+8+9?

Which of the following words don't belong in the group and why?
CORSET, COSTER, SECTOR, ESCORT, COURTS

In the picture that is attached with this question, you can find a square which comprises of four little squares inside it. Consider this square to be made with matchsticks. You have to remove two matchsticks such that only two squares remain instead of five.How will you do it ?

what does the below math rebus puzzle mean?

How is the moon similar to a dollar?

How can you make number one disappear by adding something to it?

What is at the end of a rainbow?