MATH PUZZLE: Can you replace...
[2511] MATH PUZZLE: Can you replace... - MATH PUZZLE: Can you replace the question mark with a number? - #brainteasers #math #riddles - Correct Answers: 272 - The first user who solved this task is Roxana zavari
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MATH PUZZLE: Can you replace...

MATH PUZZLE: Can you replace the question mark with a number?
Correct answers: 272
The first user who solved this task is Roxana zavari.
#brainteasers #math #riddles
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A funeral service is being hel...

A funeral service is being held in a synagogue for a woman who has just passed away. At the end of the service, the pall bearers are carrying the casket out when they accidentally bump into a wall jarring the casket.
They hear a faint moan. They open the casket and find that the woman is actually alive. She lives for 10 more years and then dies.
A ceremony is again held at the same synagogue and at the end of the ceremony the pall bearers are again carrying the casket.
As they are walking the husband cries out, "Watch out for the wall!"
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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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