Always in you, Sometimes on you;

If I surround you, I can kill you.

What am I?

A lion and its tamer are standing inside a cage that measures 1 unit in radius. Both of them can effortlessly run at the speed of 1 unit maximum.

1) Suppose the lion is hungry, will he be able to eat up the tamer?
2) If yes, how long can the tamer survive?

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

A man was driving a black truck. His lights were not on. The moon was not out. A lady was crossing the street. How did the man see her?

This is a classy optical illusion puzzle. What more you can find except bricks in the image below?

In the Chess Board picture below white army is arranged. You need to add a black army on the board such that no piece is under any threat.
Note: Army comprised of 1 king, 1 queen, 2 rooks, 2 bishops, 2 knights, and 8 pawns.

During which month do people sleep the least?

There are two dice with empty faces in front of you and a marker. You can mark any number on each of the faces of the two dice, but you have to display all 31 days of the month using the two of them.

Which numbers will you mark on which dice so that you can easily depict all the dates of the month?

John was drowned by he was not wet. How?

I know a ten-letter word in the English language which can be typed using only the top rows of the computer keyboard.