Calculate the number 6636
[6425] Calculate the number 6636 - NUMBERMANIA: Calculate the number 6636 using numbers [6, 5, 5, 7, 68, 530] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once. - #brainteasers #math #numbermania - Correct Answers: 11 - The first user who solved this task is Nasrin 24 T
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Calculate the number 6636

NUMBERMANIA: Calculate the number 6636 using numbers [6, 5, 5, 7, 68, 530] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Correct answers: 11
The first user who solved this task is Nasrin 24 T.
#brainteasers #math #numbermania
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Jigsaw puzzle

A group of girls walks into a bar. One of the women tells the bartender to line up a row of drinks for all of them. The gals lift their glasses and toast: "Here's to 51 days!" and they proceed to down their drinks.

Once again, they tell the bartender to "line 'em up" and once again they toast 51 days and down their drinks.

The bartender says: "I don’t get it. Why in the world are you toasting 51 days?"

One of the girl explains: "We just finished a jigsaw puzzle. It had written on the box '2-4 years' but we finished it in only 51 days!"

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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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