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What a winning combination?

The computer chose a secret code (sequence of 4 digits from 1 to 6). Your goal is to find that code. Black circles indicate the number of hits on the right spot. White circles indicate the number of hits on the wrong spot.

Correct answers: 47

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

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If someone with multiple perso...

If someone with multiple personalities threatens to commit suicide, is that considered a hostage crisis?

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Moving sidewalk proposed in New York City

In 1873, the idea of a "travelling sidewalk" for rapid transit along Broadway in New York City was printed in theNew York Times. Its inventor proposed to build two sidewalks, one in each direction, continually moving at 19 mph. How pedestrians would embark or disembark was not disclosed, although reportedly, the inventor had a satisfactory solution. The article continued with whimsical predictions of a traveller's experience. In fact, it was never built. In 1893, however, a moving sidewalk was successfully installed at the World's Columbian Exposition in Chicago to move people from place to place in the fairgrounds. It had two parallel platforms, the first moved at 3 mph. Riders could then step onto a 6 mph conveyor. There was a moving sidewalk, the trottoir roulant at the 1900 World Fair in Paris.«

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