What has keys but can't open locks, space but no room, and you can enter but not go outside?
Category: Knowledge · Difficulty: hard
Hint: Think about something used for typing.
Answer
A piano keyboard
Explanation
A keyboard has keys for typing, a space bar, and you can 'enter' commands.
This is a hard knowledge riddle — a tricky one that takes a little thought. The answer is A piano keyboard.
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