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Calculate the number 8815

NUMBERMANIA: Calculate the number 8815 using numbers [6, 6, 1, 7, 31, 739] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.

Correct answers: 10

The first user who solved this task is Nílton Corrêa de Sousa.

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Bottom of the Class

“I’m worried about you always being at the bottom of your class,” said the father to his son.
“Don’t worry Dad,” he replied. “They still teach the same thing at both ends.”

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Pay telephone service

In 1880, the first pay telephone service in the United States, for public use went into service. The toll was given to an attendant. It was installed by the Connecticut Telephone Co. in their office at Yale Bank Building at State and Chapel Streets in New Haven, CT. After its founding on 28 Jan1878, the New Haven exchange grew quickly. Within a few years, the company pursued expansion and interconnection of distant towns. By 1880 they had the right to build exchanges in any part of Connecticut and western Massachusetts and, more important, they had the right to interconnect their exchanges. Early toll lines from Bridgeport to New Haven to Hartford brought a good return, and toll lines were built and promoted everywhere.*

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