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Calculate the number 3019

NUMBERMANIA: Calculate the number 3019 using numbers [6, 8, 5, 8, 50, 390] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.

Correct answers: 24

The first user who solved this task is Djordje Timotijevic.

#brainteasers #math #numbermania

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Good News & Bad News

Doctor: "Do you want to hear the good news or the bad news first?"
Patient: “Good new please!”
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Electric street car

In 1880, Stephen D. Field of New York City was issued a U.S. patent for "propelling railway cars by electromagnetism" (No. 229,991). When he first used it on a street car in an electric street car in 1874, his inntion was the first electric streetcar to run successfully with current generated by a stationary dynamo. The current was conveyed by one of the rails, via a metal wheel to the onboard motor, and returned through a second metal wheel to the other rail. Field first filed for a caveat on 21 May 1879, and when issued, the patent protected his claim for this system of supplying electric power through the rails and to the motor.

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