What Has Many Keys but Can’t Open a Single Door


Riddles are a great way to exercise your brain and stay sharp! They are also a great way to help children learn how to think on their feet. If you have kids who are beginning to read, it’s a good idea for parents to teach them some riddles. This can be accomplished by reading the following riddles that the kids need to guess. Then, make up your riddles for the kids to think about.

Riddle: What Has Many Keys but Can’t Open a Single Door

Answer: “A PIANO”.

The answer for What Has Many Keys but Can’t Open a Single Door is “A PIANO”.


Pianos are usually made of wood and have a keyboard with black and white keys. You play the piano by pressing the keys with your fingers.

It is played by pressing the keys with the fingers and thumbs of both hands to cause the hammers inside the piano to strike the strings. The strings produce vibrations that create sound waves that travel through the air to the listener’s ears.

We’ve put together a short list of some famous riddles, but there are countless others out there if you want to start your collection. You can make your riddles here.

The Girl and her Room: A girl has a room of her own that requires five keys to open it. The keys are all unique, but there is one extra, which only opens the door when all the others are in place. The girl is outside, and the keys are inside, but she can’t remember where she left them. How does she get in?

Answer: The key that opens the lock is one of the five keys already in place, so, inside the room, there will be four more identical copies of this key.

Key Riddle: There are five children with the same number of keys as they have rooms in their house. The older one decides which key to use. How many children (if any) have no key at all?

Answer: None because all five of them use the same key.

KEY Riddle: A man has 12 keys, but his key ring is so large that he can’t hold on to the entire thing at once. If you were to remove two keys randomly, what is the probability that they would not be two keys next to each other?

Answer: 1/12, because there are 11 pairs of two keys and six pairs of keys that are not next to each other.

What is a Piano

A piano is a musical instrument that produces sound using pressing keys on a keyboard. Each key corresponds to a particular note, and when the player presses the key, a hammer strikes the string associated with that specific note. The resulting vibration creates sound waves in the air, which the player hears.

Name Three Keys That Unlock No Doors

Many keys unlock no doors. Here are three of them:

  1. The “master” key is supposed to open all the doors in a building but doesn’t because it’s just a copy of the original key and not the actual key.
  2. A key to a locked room or safe that has been emptied is now just a useless piece of metal.
  3. A key is given to someone as a prank, which leads them to believe they can access something when they can’t. This can be incredibly frustrating if the person tries multiple times before realizing there’s nothing.

Take a look and see how many you can solve!

A piano has many keys but can’t open a single door.