You need a key to receive an answer from me. The answer you'll find is straight from your mind. What is it?

Answer: code

More Difficult Riddles with answers

More Difficult Riddles

You seek it out, when your hunger is ripe. It sits on four legs, and smokes a pipe.
You should keep it as straight as can be, yet very few do. Most of the time it's slightly bent or curved. Your sadness usually causes it to bend further, but don’t bend it for too long or it may never be able to fully straighten out again. What is it?
You throw away the outside, eat the inside, then throw away the inside. What is it?
You throw me out when you want to use me and you take me in when you don't want to use me. Who am I?
You want to boil a two-minute egg. If you only have a three-minute timer (hourglass), a four-minute timer and a five-minute timer, how can you boil the egg for only two minutes?
You want to send a valuable object to a friend. You have a box which is more than large enough to contain the object. You have several locks with keys. The box has a locking ring which is more than large enough to have a lock attached. But your friend does not have the key to any lock that you have. How do you do it? Note that you cannot send a key in an unlocked box, since it might be copied.
You’ll have me at night and if you remove the first letter I denote the top, such as on a train
You'll see savory dishes in Hong Kong sizzling in these.
(A) Use two digits to make the smallest possible positive integer. (B) Five 3s can express 37: 37=33+3+3/3 Find another way to do it. (C) Use six identical digits to make 100. (Several solutions are possible.) (D) Use five 4s to make 55. (E) Use four 9s to make 20.
A 300 ft. train is traveling 300 ft. per minute must travel through a 300 ft. long tunnel. How long will it take the train to travel through the tunnel?
A beacon from home to guide your way. It can be a lifesaver on a stormy day. What is it?
A blind man enters a maze, and the entrance closes behind him. His only way out is to solve the maze. A long time passes, and he exits the maze through the correct exit. How did he solve the maze?