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How many triangles can be formed from the given points?

Author: Nebojsa Jevtovic (Serbia)

Correct answers: 43

The first user who solved this task is Sanja Šabović.

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A woman phoned her dentist whe...

A woman phoned her dentist when she received a huge bill. "I'm shocked!" she complained. "This is three times what you normally charge."
"Yes, I know," said the dentist. "But you yelled so loud, you scared away two other patients."

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Johann Gottfried Galle

Born 9 Jun 1812; died 10 Jul 1910 at age 98. German astronomer who on 23 Sep 1846, was the first to observe the planet Neptune, whose existence had been predicted in the calculations of Leverrier. Leverrier had written to Galle asking him to search for the 'new planet' at a predicted location. Galle was then a member of the staff of the Berlin Observatory and had discovered three comets. In 1838, while assistant to Johann Franz Encke, Galle discovered the dark, inner C ring of Saturn at the time of the maxium ring opening. In 1851, he became professor of astronomy at Breslau and director of the observatory there. In 1872, he proposed the use of asteroids rather than regular planets for determinations of the solar parallax, a suggestion which was successful in an international campaign (1888-89).

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