Logic Riddles

Question: Surrounded by life , yet life is its biggest enemy. But without life there is no need for it to exist. What is it?

Question: Every time you lose something, you always find it in the very last place you would look.

Why is this?

Question: What is 40 divided by 1/2, plus 15?

Question: If you toss a coin ten times and it lands heads up every time, what are the chances it will land heads up if you toss it again?

Question: There were 3 men playing on a field playing a game. The guy that had the lowest score won the game. How is this possible?