Logic Riddles

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

Why is this?

Question: There was three elephants who were about to leave the home. They only had one umbrella. They all try to fit under that on umbrella. When the elephants reach their destination, none of them are the slight least wet. How could this be possible?

Question: Why is a room full of married people like an empty one?

Question: I work in a battle of wits. The battle is again with only two while an army each has. Each must take a turn in stratagem but to win the leader must die. What am I?

Question: Which is correct "The yolk of the egg is white" or "The egg yolk is white?"