Easy riddles

You are walking down a path when you come to two doors. Opening one of the doors will lead you to a life of prosperity and happiness, while opening the other door will lead to a life of misery and sorrow. You don't know which door leads to which life. In front of the doors are two twin brothers who know which door leads where. One of the brothers always lies, and the other always tells the truth. You don't know which brother is the liar and which is the truth-teller. You are allowed to ask one single question to one of the brothers (not both) to figure out which door to open. What question should you ask?

What has a tongue, cannot walk, but gets around a lot?

What do you get when you drop a pumpkin?

What can you lose that will cause other people to lose theirs too?

What is the last thing you take off before bed?

Armored but not a knight, snapping but not a twig, and always at home, even on the move. What am I?

I create my lair with earthen string and dispatch my prey with a biting sting. What am I?

Farmer Brown came to town with some watermelons. He sold half of them plus half a melon and found that he had one whole melon left. How many melons did he take to town?

Why did the man ask his wife for a map?

Every time you lose something, you always find it in the very last place you would look. Why is this?