I HAVE A HEART AND MY LAST FIVE LETTERS MEAN THE SAME AS STRUGLE RIDDLES WITH ANSWERS TO SOLVE - PUZZLES & BRAIN TEASERS

What has 4 letters.

Sometimes has 9 letters.

Never has 5 letters. Did you answer this riddle correctly?
YES  NO  

Binary Did you answer this riddle correctly?
YES  NO  

Loneliness. Did you answer this riddle correctly?
YES  NO  

Post Office Did you answer this riddle correctly?
YES  NO  

The man was dead before getting shot in the heart. Did you answer this riddle correctly?
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The correct answer is T-H-A-T. Did you answer this riddle correctly?
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The possible answer is Wendigo Did you answer this riddle correctly?
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Wedding vows. Did you answer this riddle correctly?
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The cabin was on a ship! Did you answer this riddle correctly?
YES  NO  

Sleep. Its the time your mind organizes memories and knowledge. Sleep deprivation is miserable (as you well know if youve experienced it). If you miss a few nights of sleep, you can sleep more to catch up with no problems. And some believe that segmented sleep, where you sleep, wake for an hour, then go back to sleep, was the dominant form of sleep before the Industrial Revolution. Did you answer this riddle correctly?
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They read the same right side up and upside down. Did you answer this riddle correctly?
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The letter C. (Sea) Did you answer this riddle correctly?
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Noel (more literally no l). Did you answer this riddle correctly?
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They are the only three US state abbreviations whose two letters are next to each other in the alphabet.

DE Delaware
HI Hawaii
MN Minnesota Did you answer this riddle correctly?
YES  NO  

Earth and heart Did you answer this riddle correctly?
YES  NO