MY LIFE LAST HOURS THE THING I PRODUCE IS CONSUMING ME IM IMMUNE FROM GREY LIGHT RIDDLES WITH ANSWERS TO SOLVE - PUZZLES & BRAIN TEASERS

As soon as the 3rd person was tagged they'd run to a corner where no one is standing since person 1 is at corner 2, person 2 is corner 3 person 3 is corner 4.

Since they can't find a person there they screamed. Did you answer this riddle correctly?
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They were diving, wearing the old-fashioned diving suits that have a tube that goes to the surface. The were exploring a sunken submarine. When the man shut the door, it cut the air tube, and he died. Did you answer this riddle correctly?
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The guy who drank five glasses survived because the poison was in the middle of ice cubes. He drank rapidly and thus the ice had no chance to melt in his drink while the other one drank slowly and thus enough ice had melted in his drink to poison it heavily and he died. Did you answer this riddle correctly?
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We know from (3) that the youngest person was not the victim, from (4) that the youngest person was not the helper and from (6) that the youngest person was not the killer. The youngest person can only have been the witness therefore. If we make up a chart there are now three possible combinations:

Oldest person (father) H H M

Next to oldest (mother) V M H

Next to youngest (son) M V V

Youngest (daughter) W W W

(H = Helper ; V = Victim ; M = Murderer ; W = Witness)

We can work out from (5) that the father was the oldest, from (2) that the youngest person must have been the daughter. Therefore the next to the youngest must have been the son and the next to the oldest, the mother.

Of three possibilities: the first is impossible (from (3) the youngest person and the victim were of different sexes); the third is also impossible (from (1) the witness and the helper were of different sexes). Therefore only the second possibility holds and the mother was the murderess Did you answer this riddle correctly?
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Ice Cream Man Did you answer this riddle correctly?
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Answers is "Cappuccino" (A Type of Coffee)

Baristas create quite fancy artwork on the milk foam on top of your cup.
Many people take pictures of that and post it on Instagram, Facebook etc.

When the cup is empty, the milk is gone.(Pictures Disappear)
"Anxious hearbeats stilled" refers to the addiction some people have towards coffee.

Many people drink coffee, especially in the morning
(in Italy, you drink Cappuccino only in the morning, in the afternoon you would go for an Espresso).
Coffee puts you in motion.

Well, coffee can keep you from sleeping,
after all that's why most people need it in the morning. Did you answer this riddle correctly?
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A book Did you answer this riddle correctly?
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It is DAYTIME. Did you answer this riddle correctly?
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Charcoal Did you answer this riddle correctly?
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Whatever you bring has to be spelled with double letters. Did you answer this riddle correctly?
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He died of a heart attack (all of the deaths are related to a suit in a deck of cards). Did you answer this riddle correctly?
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Earth and heart Did you answer this riddle correctly?
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A pumpkin Did you answer this riddle correctly?
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Get wet! Did you answer this riddle correctly?
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A coconut Did you answer this riddle correctly?
YES  NO