Calculate the number 4291
[5594] Calculate the number 4291 - NUMBERMANIA: Calculate the number 4291 using numbers [4, 3, 4, 5, 54, 503] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once. - #brainteasers #math #numbermania - Correct Answers: 20 - The first user who solved this task is Djordje Timotijevic
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Calculate the number 4291

NUMBERMANIA: Calculate the number 4291 using numbers [4, 3, 4, 5, 54, 503] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Correct answers: 20
The first user who solved this task is Djordje Timotijevic.
#brainteasers #math #numbermania
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Door To Door

Two salesmen were going door to door, and knocked on the door of a woman who was not happy to see them. She told them in no uncertain terms that she did not want to hear their offer and slammed the door in their faces. To her surprise, however, the door did not close and, in fact, bounced back open. She tried again, really put her back into it, and slammed the door again with the same result-the door bounced back open.
Convinced these rude young people were sticking their foot in the door,she reared back to give it a slam that would teach them a lesson, when one of them said:

“Ma'am, before you do that again you need to move your cat.”

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Shiing-shen Chern

Died 3 Dec 2004 at age 93 (born 26 Oct 1911). Chinese-American mathematician and educator whose researches in differential geometry include the development of the Chern characteristic classes in fibre spaces, which play a major role in mathematics and in mathematical physics. “When Chern was working on differential geometry in the 1940s, this area of mathematics was at a low point. Global differential geometry was only beginning, even Morse theory was understood and used by a very small number of people. Today, differential geometry is a major subject in mathematics and a large share of the credit for this transformation goes to Professor Chern.”- C N Yang, quoted from the book, Chern, a great geometer of the twentieth century. (1992)
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