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Darko Nesovic

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last 3 solved tasks
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.
If 8c3aa + 3c22c = bbc58a find number abc. Multiple solutions may exist.

Wilhelm Hisinger

Died 28 Jun 1852 at age 85 (born 23 Dec 1766).Swedish mineralogist who inherited his father's iron works, and pursued science privately. From one of his iron mines at Bastnäs came a mineral of unusually high density. Hisinger distributed samples to several European chemical analysts. After his examination in 1803, Martin Klaproth suspected it held a new element. That year, both Hisinger and Jöns Berzelius isolated the new element. They named it cerium in recognition of Giussepe Piazzi's discovery of the new minor plant, Ceres, two years earlier (1 Jan 1801). In 1806, Hisinger investigated electricity's effect on salt solutions. He contributed to the geological knowledge of his country, and recorded finds of its animal and plant fossils. He also amassed fine rock, mineral and fossil collections, which he eventually gave to the Swedish natural history museum.«

Ski Buddies

Three guys go on a skiing holiday together and to save money they rented only one room. After a full day on the slopes, they return to their room, exhausted and cold.
To keep warm, they all sleep in the same bed. The next morning, the guy on one side of the bed says he had a funny dream that some one was jerking him off. The guy on the other side of the bed said that he had the same dream!
The the guy in the middle said, "I had a dream last night, too. But I only dreamt that I was skiing."  

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