Mathematical Puzzle: IF 2+3=...
[6365] Mathematical Puzzle: IF 2+3=... - Mathematical Puzzle: IF 2+3=25, 4+5=45 and 0+8=40 THEN 1+6=? - #brainteasers #math #riddles - Correct Answers: 109 - The first user who solved this task is Nasrin 24 T
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Mathematical Puzzle: IF 2+3=...

Mathematical Puzzle: IF 2+3=25, 4+5=45 and 0+8=40 THEN 1+6=?
Correct answers: 109
The first user who solved this task is Nasrin 24 T.
#brainteasers #math #riddles
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Black Eyes

A man walked into work on Monday with two black eyes. His boss asked what happened.
The man said, "I was sitting behind a big woman at church. When we stood up to sing hymns, I noticed that her dress was caught in her crack, so I pulled it out. She turned around and punched me square in the eye."
"Where did you get the other shiner?" the boss asked.
"Well," the man said, "I figured she didn't want it out, so I pushed it back in."

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DuPrene

In 1931, The DuPont company, of Wilmington, Delaware, announced the first synthetic rubber. It was known as DuPrene, and from 1936 as Neoprene. Many scientists were trying to make natural rubber in the 1920s and 30s. One of the Wallace Carothers team, Gerard Berchet, had left a sample of monovinylacetylene in a jar with hydrochloric acid (HCl) for about five weeks. Then on 17 Apr 1930, coworker Arnold M. Collins happened to look in that jar and found a rubbery white material. The HCl had reacted with the vinylacetylene, making chloroprene, which then polymerized to become polychloroprene. The new rubber was expensive, but resisted oil and gasoline, which natural rubber didn't. It was the first good synthetic rubber.[Image: Wallace Carothers showing the new DuPrene product]
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