Calculate the number 3731
[4776] Calculate the number 3731 - NUMBERMANIA: Calculate the number 3731 using numbers [4, 7, 1, 2, 86, 662] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once. - #brainteasers #math #numbermania - Correct Answers: 18 - The first user who solved this task is Djordje Timotijevic
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Calculate the number 3731

NUMBERMANIA: Calculate the number 3731 using numbers [4, 7, 1, 2, 86, 662] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Correct answers: 18
The first user who solved this task is Djordje Timotijevic.
#brainteasers #math #numbermania
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A brilliant young boy was app...

A brilliant young boy was applying for a job with the railways. The interviewer asked him: "Do you know how to use the equipment?" "Yes", the boy replied. "Then what would you do if you realized that 2 trains, one from this station and one from the next were going to crash because they were on the same track?" The young applicant thought and replied "I'd press the button to change the points without hesitation." "What if the button was frozen and wouldn't work?" "I'd run outside and pull the lever to change the points manually" "And if the lever was broken?" "I'd get on the phone to the next station and tell them to change the points," he replied. "And if the phone was broken and needed an electrician to fix it?" The boy thought about that one. "I'd run into town and get my uncle" "Is your uncle an electrician?" "No, but he's never seen a train crash before!"
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Sources of all energy

In 1881, in a PresidentialAddress to the British Association, at York, Sir William Thomson (Lord Kelvin) spokeOn the Sources of Energy in Nature Available to Man for the Production of Mechanical Effect. He summarized the natural sources of energy as Tides, Food, Fuel, Wind, and Rain. All except the tides derive energy from the sun. “Heat radiated from the sun ... is the principal source of mechanical effect available to man.” He referred to tide mills, and the possibility of storing energy in batteries between tides, but nevertheless considered the economics impractical for wide application. Windpower he considered “decadent,” but acknowledged coal would become an exhausted resource, thus windmills should generate electrical power. Kelvin also outlined the economics of hydroelectricity.«
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