Calculate the number 1564
[2364] Calculate the number 1564 - NUMBERMANIA: Calculate the number 1564 using numbers [8, 4, 5, 1, 91, 717] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once. - #brainteasers #math #numbermania - Correct Answers: 28 - The first user who solved this task is Erkain Mahajanian
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Calculate the number 1564

NUMBERMANIA: Calculate the number 1564 using numbers [8, 4, 5, 1, 91, 717] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Correct answers: 28
The first user who solved this task is Erkain Mahajanian.
#brainteasers #math #numbermania
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Kissing Blarney Stone

A group of Americans were touring Ireland.

One woman in the group was constantly grumbling: The bus seats are uncomfortable. The food is terrible. It's too hot. It's too cold. The accommodations are awful.

The group reached the site of the famous Blarney Stone. "Kissing the Blarney Stone brings good luck all your life," the guide explained. "Unfortunately, it's being cleaned today, so no one can kiss it. Maybe we can return tomorrow."

"We can't be here tomorrow," the cantankerous woman snapped. "We have another dull tour to attend. So, I guess we can't kiss that silly stone."

"Well," the guide replied, "it's said that if you kiss someone who has kissed the stone, you'll receive the same good fortune."

"I suppose you've kissed the stone," the woman scoffed.

"No, ma'am," the exasperated guide responded, "but I've sat on it."

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Goodyear

In 1837, Charles Goodyear obtained his first rubber-processing patent (U.S. No. 240). At this time, the original india-rubber would become sticky melt in the summer heat. Goodyear resolved to solve this problem. After various unsuccessful methods, he devised a process to treat the India rubber with metallic solutions such as copper nitrate and strong acid for a few minutes, followed by washing with water. Such process treated both rubber on the surface and below the surface to a useful condition. His patent explained this method, and also the use of a water paste of quicklime to bleach the rubber for which he listed various new purposes. He obtained additional patents as he continued to revised his process by using sulphur and oil of turpentine.
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