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What number comes next?

Look at the series (17, 51, 204, 1020, 6120, ?), determine the pattern, and find the value of the next number!

Correct answers: 130

The first user who solved this task is Rasoul Jafari.

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At The Bar

I was sitting at a bar with a friend the other night when he casually pointed across the bar from us and said, "see those two old drunks sitting there... that's going to be us in ten years."

I looked and him and said, "that's a mirror stupid!"

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Balfour Stewart

Born 1 Nov 1828; died 19 Dec 1887 at age 59. Scottish meteorologist and geophysicist who studied terrestrial magnetism and radiant heat. His researches on radiant heat contributed to foundation of spectrum analysis. He was the first to discover that bodies radiate and absorb energy of the same wavelength. In meteorology, he pioneered in ionospheric science, making a special study of terrestrial magnetism. He proposed (1882) that the daily variation in the Earth's magnetic field could be due to air currents in the upper atmosphere, which act as conductors and generate electrical currents as they pass through the Earth's magnetic field. He also investigated sunspots. In 1887, he suffered a stroke while crossing to spend Christmas at his estate in Ireland and died soon after at the age of 59.«

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