What Has 88 Keys but Can’t Open a Single Door? is a favourite riddle for music lovers. The number is a big clue. Have a guess, then tap Show Answer.
Riddle: What has 88 keys but can’t open a single door?
Answer: piano
Need a hint?
Its keys are black and white, and pressing them makes music.
Answer and explanation (spoiler!)
The answer is a piano.
A standard piano has 88 keys: 52 white keys and 36 black keys. They’re called keys, but they make notes instead of unlocking anything.
The riddle uses the two meanings of “key”: the metal key that opens a lock, and the key you press on a piano or keyboard.
Difficulty: Easy · Best for: ages 6 and up
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FAQ
Does every piano have 88 keys?
Most modern pianos do. Some older pianos and small keyboards have fewer, but 88 is the standard.
Could a computer keyboard be the answer?
A keyboard has keys too, but most have around 100, not 88. The number 88 points to a piano.