A MAN IN A CAR SEE A DOOR GOLD DOOR SILVER DOOR AND DIAMOND DOOR WHICH DOOR HE OPEN FIRST WI RIDDLES WITH ANSWERS TO SOLVE - PUZZLES & BRAIN TEASERS

The answer is the letter 'N'.

The riddle says 'take me out of a window and I leave a grieving wife'. Now if you think carefully and analyze some of the words in the sentence, you will find the answer to the whole riddle. In this case, the word is 'window' and if you remove the letter 'n' from the word, the word will become widow (I leave a grieving wife). Now the first sentence will make sense as if you read.

he second sentence says 'but stick me in a door, and I can save somebody's life'. Now in this sentence, the word 'door' is the one you need to analyze. If you add the letter 'N' in the word door, it becomes donor(I can save somebody's life). Did you answer this riddle correctly?
YES  NO  

The letter 'n'. Throw out the letter n from the word window and you have widow. Bring back the word n to door and you have donor. Did you answer this riddle correctly?
YES  NO  

A door. Did you answer this riddle correctly?
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A door! Did you answer this riddle correctly?
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Because there's always one Mordor. Did you answer this riddle correctly?
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At the front door Did you answer this riddle correctly?
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Door Did you answer this riddle correctly?
YES  NO  

The front door Did you answer this riddle correctly?
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A key. It has a jagged cut in order to fit the lock. A locked door keeps people out and the keyhole is dark. Key rings are a common way to hold a set of keys, and when youre using a key that one is quiet, but the rest jingle and jangle. Did you answer this riddle correctly?
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Doorbell Did you answer this riddle correctly?
YES  NO  

A pumpkin Did you answer this riddle correctly?
YES  NO  

Because he is full of pains (panes). Did you answer this riddle correctly?
YES  NO  

A doorbell Did you answer this riddle correctly?
YES  NO  

A door Did you answer this riddle correctly?
YES  NO  

Playing Monopoly. Did you answer this riddle correctly?
YES  NO