Calculate the number 2878
[7602] Calculate the number 2878 - NUMBERMANIA: Calculate the number 2878 using numbers [4, 7, 5, 4, 39, 282] 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 2878

NUMBERMANIA: Calculate the number 2878 using numbers [4, 7, 5, 4, 39, 282] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Correct answers: 1
#brainteasers #math #numbermania
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Sunburn

A doctor is making his rounds in the hospital when he comes upon a guy with the worst case of sunburn he has ever seen. The poor guy is burnt raw from head to toe and is in agony. He says to the doctor, "Is there anything you can give me to ease this terrible pain?"
So the doctor says, "Yes, I'll prescribe you some Viagra".
"Viagra?" says the poor guy. "How will that help my sunburn?".
"It won't help your sunburn much" says the doctor, "but at least it'll keep the sheets off it!"    

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Sir Ambrose Fleming

Died 18 Apr 1945 at age 95 (born 29 Nov 1849). John Ambrose Fleming was an English electrical engineer who invented, and coined the name for, the first thermonic valve (also known as a vacuum tube). It was a diode with two electrodes, that acted as a rectifier, restricting current to flow in only one direction in a circuit (patented 1904). It made use of the Edison effect— the emission of electrons from a heated metal surface. By sealing a heated filament in a glass envelope containing a vacuum, the internal movement of electrons was not obstructed by gas molecules. The second electron at high positive voltage attracted the electrons released from the surface of the first, heated, electrode. It was applied the device in circuits for the nacent telecommunications industry. His name is remembered in the Fleming “Left Hand Rule” mnemonicfor relating the directions of motion, current and magnetic field for a motor.«
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