What has many keys but can't open a single lock?
The Piano has many keys but it can't open a single lock.
What's the only room from which no one can enter or leave?
A mushroom.
What is the only question you can't answer yes too?
Are you asleep?
What is black when it's clean and white when it's dirty?
A chalkboard (or blackboard). It's solid black when clean, and as you write on it with white chalk it becomes dirty.
What's not alive but can die?
Battery. A dead battery is referred to as a discharged battery
What has legs but doesn't walk?
An Armchair
What can run but never walks has a mouth but never talks has a head but never weeps has a bed but never sleeps.
River
Everyone has it but no one can lose it, what is it?
A shadow.
What has an eye but can not see?
needle
What has a bottom at the top?
Your legs
A man stands on one side of a river, his dog on the other. The man calls his dog, who immediately crosses the river without getting wet and without using a bridge or a boat. How did the dog do it?
The river was frozen
What has teeth but Cannot bite?
Comb have teeth but cannot bite.
Who has 13 hearts but no organs?
A Deck of Cards
What has a neck but no head?
shirt