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Calculate the number 1721

NUMBERMANIA: Calculate the number 1721 using numbers [2, 7, 1, 6, 41, 745] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.

Correct answers: 28

The first user who solved this task is Sanja Šabović.

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Todd Barry: Summer School

I never understood the concept of summer school. The teachers going to go up there and go, OK, class, you know that subject you couldnt grasp in nine months? Were going to whip it out in six weeks.

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American Rocket Society

In 1930, the American Interplanetary Society was founded by G. Edward Pendray, David Lasser, Laurence Manning and others. Its was known as the American Rocket Society from 6 Apr 1934. Through the 1930s, the group designed an experimental test stand and tested liquid-fuelled rockets. Their pioneering work led the way to the United States space program. Their ARS-4 rocket, was the first launched in America to break the sound barrier (9 Sep 1934). It was fired from from Marine Park, Staten Island, N.Y., reached a top speed of 700 mph, travelled to a maxium height of 400-ft and a horizontal range of 1,600-ft. In early 1963, it merged with the American Institute of Aeronautics and Astronautics (AIAA).«

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