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Perform this calculation in ...

Perform this calculation in your head, mentally adding the numbers as quickly as you can. Start with 1000 and add 40. Now add 1000. Add 30 to that, then add another 1000. Now add 20 to that result. Add another 1000 and finally, add 10 to that. What is the total?

Correct answers: 86

The first user who solved this task is Sanja Šabović.

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I LANDED ON A RUSSIAN ATHLETE...

I LANDED ON A RUSSIAN ATHLETE AND THE NEXT THING I KNOW...

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Legionnaire's disease

In 1977, the isolation of the bacterium Legionella pneumophila that was the cause of Legionnaire's Disease, was described in a scientific paper published in The New England Journal of Medicine by scientists at the Centers for Disease Control (CDC) in Atlanta, Georgia, USA*. They had first announced that they had sufficient laboratory evidence to implicate a bacterium on 18 Jan 1977 as responsible for an outbreak of this disease in Philadelphia in 1976, largely among people attending a state convention of the American Legion, which led to the name "Legionnaires' Disease." After the bacterium causing the illness was named, the name of the illness was changed to legionellosis.[Image: Legionella pneumophila multiplying inside a cultured human lung fibroblast. Multiple intracellular bacilli, including dividing bacilli, are visible in longitudinal and cross section. Transmission electron micrograph.]

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