Good Riddles

Question: There are three doors: First door~ all kinds of snake will strike you once you've entered this door. Second door~ about thousands of skillful assassins are waiting in this door. Once you've entered, they will attack you to death until there are no bones left. 3rd door~ a desert, you will be die any minutes. Because there's no water (exhaustion) and from extreme the heat of the sun. Which door would you choose? Which door you think that is safe to enter???

Question: There is a wood house and a brick house that was on fire at the same time. Which house would the ambulance come to first.

Question: The sky is blue, the sea is green. The answer never ends in-between.

Question: I am both black and white. I go with the flow and my loyalty never wavers.

Question: Find the five digit number in which the first digit is one half of the the 4 fourth digit, the second digit is one fourth of the last digit, the fourth digit is 3 times the second digit, and the third digit is the first digit plus 4.