Calculate the number 2942
[5934] Calculate the number 2942 - NUMBERMANIA: Calculate the number 2942 using numbers [3, 7, 4, 5, 49, 279] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once. - #brainteasers #math #numbermania - Correct Answers: 13 - The first user who solved this task is Nílton Corrêa De Sousa
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Calculate the number 2942

NUMBERMANIA: Calculate the number 2942 using numbers [3, 7, 4, 5, 49, 279] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Correct answers: 13
The first user who solved this task is Nílton Corrêa De Sousa.
#brainteasers #math #numbermania
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Windows frozen, won't open.

Wife texts husband on a cold winter morning: "Windows frozen, won't open."

Husband texts back: "Gently pour some lukewarm water over it and then gently tap edges with hammer."

Wife texts back 10 minutes later: "Computer really messed up now."

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Railroad car coupler

In 1897, a U.S. patent was issued to black American inventor, Andrew Jackson Beard for his invention of the "Jenny coupler," (U.S. No. 594,059). It does the dangerous job of hooking railroad cars together by simply allowing them to bump into each other, when "horizontal jaws engage each other to connect the cars." Beard's idea has probably saved countless lives and limbs. It remains in use today. He received $50,000 for the patent rights to the "Jenny Coupler." Beard was born a slave on a plantation in Alabama, shortly before slavery ended. He was a farmer, carpenter, blacksmith, a railroad worker, a businessman and finally an inventor. Beard's other patents included a steam driven rotary engine, and a double plow.
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