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Calculate the number 544

NUMBERMANIA: Calculate the number 544 using numbers [9, 2, 1, 8, 89, 329] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.

Correct answers: 31

The first user who solved this task is Sanja Šabović.

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You do not know you are dead

Remember, when you are dead, you do not know you are dead. It is only painful for others. The same applies when you are stupid

I like a drink as much as the next man. Unless the next man is Mel Gibson.

Author:Ricky Gervais

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Black American patent

In 1897, a U.S. patent for an improvement in "Casting Composite or Other Wheels" was issued to black American inventor E.R. Robinson (No. 594,286). It gave a method for casting wheels wherein the outer sides are of one metal and the interior portions are of another metal. The importance was not only to enable casting a metal of high electrical conductivity, such as brass, in a groove of an iron trolley wheel - but also to permit an entirely new contruction consisting of two outer disks or flanges and an intermediate, uniting portion, which extends from the contact portion of the wheel with a web extending to the centre and an integral bushing. Robinson also held a previous patent, issued four years earlier, for an "electric railway trolley."[Image: plan view of bottom section of a wheel three-part mold]

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