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Calculate the number 735

NUMBERMANIA: Calculate the number 735 using numbers [4, 2, 9, 6, 66, 403] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.

Correct answers: 33

The first user who solved this task is Sanja Šabović.

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The maids revenge

Just after the maid had been fired. She took five bucks from her purse, she threw it to Fido, the family dog. When asked why by her former employer, she answered, "I never forget a friend. This was for helping me clean the dishes all the time!

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First U.S. gas auto patent

In 1895, George B. Selden of Rochester, New York, received the first U.S. patent for a gasoline-driven automobile. In the patent, which he had filed several years earlier, on 8 May 1879, he described not only the engine but also a complete automobile incorporating such features as a clutch, compressed air self-starter, and steering system (No. 549,160). Seldon maintained that it was the combination of these elements, together with his engine, made the road-engine patentable. As a patent attorney, he knew to delay the issue of the patent by sending ammendments and other communications every two years. Meanwhile, others did the hard work of developing the automobile, and his patent became more valuable. Years of legal wrangling for profits followed.

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