BRAIN TEASERS

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Find the right 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: 75

The first user who solved this task is Sanja Šabović.

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I'm the kind of crazy

I'm the kind of crazy you weren't warned about because no one knew this level existed.

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Edison's Pearl Street generator test

In 1882, the first of six steam-driven air-cooled generators being installed at Thomas Edison’s Pearl Street power station was fired up for testing. Each would be capable of producing about 90 kW DC at 110 volts DC. Three days later, the first, the 27 ton “Jumbo No. 1,” was ready to test for electricity generation, and on 8 Jul 1882, it illuminated a large panel of incandescent bulbs. Its armature alone weighed 6 tons. All six had been built at the Edison Machine Works, all were installed by August.. Each could power about 700 sixteen-candlepower lamps. This was Edison's first central power station, which had an opening ceremony on 4 Sep 1882. Later the following year, it served 508 subscribers and supplied 12,732 bulbs.«

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