HE HILTON FAMILY ARE TAKING A TRAIN RIDE ON THE TRAIN THERE IS A GRANDMOTHER A GRANDFATHER TWO MOTHERS TWO FATHERS FOUR CHI RIDDLES WITH ANSWERS TO SOLVE - PUZZLES & BRAIN TEASERS

The question itself says "someone's" mom. Given the name of the three other sons the name of the fourth son can be Someone. Did you answer this riddle correctly?
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A seesaw. Did you answer this riddle correctly?
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Zero. If read to grammatical perfection, the riddle uses the word 'had' in a pas-tense format which means he no longer has children.

Therefore all of the daughters and brothers could be from a prior marriage, affair etc. Although, again, the riddle doesn't not specify that the brothers are 'step brothers.' Did you answer this riddle correctly?
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If 7 men have 7 wives that simply means there are 7 coupled, so that is 7 +7 = 14.
Then, if each couple has a child, that's 14 + 7 = 21.
So the total number of people is 21. Did you answer this riddle correctly?
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There are 10 legs under the table in total. We have a grandmother (a mother), her daughter (both a mother and a daughter) and her granddaughter (a daughter and granddaughter) hence how we have the number of mothers and daughters sat around the table. Did you answer this riddle correctly?
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Six legs are on the floor. Did you answer this riddle correctly?
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The answer is the meat!

The butcher weighs meat at his shop. The riddle is talking what the person weight at his shop and not the actual weight of the person and its not possible to tell from the riddle question.

The riddle tricks you to think about the actual weight of the person and as I told you its not possible to determined. This riddle is very popular and has many versions with the different names but the answer remines the same. Did you answer this riddle correctly?
YES  NO