MATH PUZZLE: Can you replace...
[3313] MATH PUZZLE: Can you replace... - MATH PUZZLE: Can you replace the question mark with a number? - #brainteasers #math #riddles - Correct Answers: 402 - The first user who solved this task is Fazil Hashim
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MATH PUZZLE: Can you replace...

MATH PUZZLE: Can you replace the question mark with a number?
Correct answers: 402
The first user who solved this task is Fazil Hashim.
#brainteasers #math #riddles
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An elderly man and his wife, v...

An elderly man and his wife, vacationing at a cabin by the lake, were sitting on the porch and reminiscing about their younger years.
"This is the lake where I learned how to swim when I was a small boy," the husband said. "My father threw me into the water and I had to learn how to dog paddle to get back to the shore or drown. It was sink or swim."
"That was a cruel thing for your father to do," the wife said. "How could a loving father do such a thing to a small child? That must have been a very difficult way to learn how to swim."
"Not really," replied the husband. "Learning how to swim was the easy part. Getting out of that burlap bag first was the hard part!"
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Guncotton patent

In 1846, Christian Frederick Schönbein of Basle, Switzerland, was issued a U.S. Patent for guncotton titled “Improvement in Preparation of Cotton-Wool and Other Substances as Substitutes for Gunpowder”(No. 4874). The process uses a mixture of concentrated acids to convert the cellulose present in well-cleaned cotton-wool, C6H10O5 into cellulose nitrate C6H8(NO2)2O5 (nitrocellulose). In 1891, James Dewar and Frederick Abel incorporated nitrocellulose in a mixture that could be handled more safely. Until WW II, this invention replaced gunpower on the battlefield, where it had been used for five centuries. It was also useful for blasting because it generates about six times the gas of an equal volume of gunpowder and produces less smoke and heat.
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