Calculate the number 843
[7637] Calculate the number 843 - NUMBERMANIA: Calculate the number 843 using numbers [5, 5, 4, 7, 43, 642] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once. - #brainteasers #math #numbermania - Correct Answers: 1
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Calculate the number 843

NUMBERMANIA: Calculate the number 843 using numbers [5, 5, 4, 7, 43, 642] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Correct answers: 1
#brainteasers #math #numbermania
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Explosion

A terrifying explosion occurs in a gunpowder factory, and once all the mess has been cleared up, and inquiry begins.
One of the few survivors is pulled up to make a statement. "Okay Simpson," says the investigator, "you were near the scene, what happened?"
"Well, it's like this. Old Charley Higgins was in the mixing room, and I saw him take a cigarette out of his pocket and light up."
"He was smoking in the mixing room?" the investigator said in stunned horror, "How long had he been with the company?"
"About 20 years, sir"
"20 years in the company, then he goes and strikes a match in the mixing room, I'd have thought it would have been the last thing he'd have done."
"It was, sir."        

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Sir Alexander Fleming

Born 6 Aug 1881; died 11 Mar 1955 at age 73. Scottish bacteriologist who discovered penicillin. In 1928, while working on influenza virus, he observed that mould had developed accidently on a staphylococcus culture plate and that the mould had created a bacteria-free circle around itself. He experimented further and he found that a mould culture prevented growth of staphylococci, even when diluted 800 times. The active substance, which he named penicillin, initiated the highly effective practice of antibiotic therapy for infectious diseases. Fleming shared the Nobel Prize for Physiology or Medicine in 1945 with Ernst Boris Chain and Howard Walter Florey, who both (from 1939) continued Fleming's work.
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