Find number abc
[5968] Find number abc - If 7bb49 - 2249a = 5c85b find number abc. Multiple solutions may exist. - #brainteasers #math - Correct Answers: 30 - The first user who solved this task is Nílton Corrêa De Sousa
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Find number abc

If 7bb49 - 2249a = 5c85b find number abc. Multiple solutions may exist.
Correct answers: 30
The first user who solved this task is Nílton Corrêa De Sousa.
#brainteasers #math
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Boy Scout on the plane

A doctor, a lawyer, a little boy scout and a pastor were out for a Sunday afternoon flight on a small private plane.

Suddenly, the plane developed engine trouble. In spite of the best efforts of the pilot, the plane started to go down.

Finally, the pilot grabbed a parachute, yelled to the passengers that they had better jump, and bailed out.

Unfortunately there were only three parachutes remaining.

The doctor grabbed one and said "I'm a doctor, I save lives, so I must live," and jumped out.

The lawyer then said "I'm the smartest man in the world, I deserve to live!" He grabbed a parachute and jumped, also.

The pastor looked at the little boy scout and said, "My son, I've lived a long and full life. You are young and have your whole life ahead of you. Take the last parachute and live in peace."

The little boy scout handed the parachute back to the pastor and said "Not to worry, Preacher. 'The smartest man in the world' just jumped out with my back pack."

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Three element vacuum tube

In 1907, the three-element vacuum tube was issued a U.S. patent to its inventor, Dr Lee de Forest as a “device for amplifying feeble electric currents - such, for example, as telephone currents” (No. 841,387). The tube was evacuated, with some remaining conducting gas molecules, and it was suggested using for the heated electrode such material as platinum, tantalum or carbon. He had made a public annoucement of his device a few months earlier, on 20 Oct 1906 at a meeting of the American Institute of Electrical Engineers held in New York City. On 18 Feb 1908, he received another patent for the grid electrode tube (No. 879,532).
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