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Calculate the number 8175

NUMBERMANIA: Calculate the number 8175 using numbers [6, 4, 5, 7, 41, 913] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.

Correct answers: 2

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Christmas tree search

There were two blondes who went deep into the frozen woods searching for a Christmas tree.
After hours of subzero temperatures and a few close calls with hungry wolves, one blonde turned to the other and said, "I'm chopping down the next tree I see. I don't care whether it's decorated or not!"

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Robert S. Dietz

Died 19 May 1995 at age 80 (born 14 Sep 1914).Robert Sinclair Dietz was an American geophysicist and oceanographer who set forth a theory (1961) of seafloor spreading (a term he coined), in which new crustal material continually upwells from the Earth's depths along the mid-ocean ridges and spreads outward at a rate of several inches per year. While a student Dietz identified the Kentland structure in Indiana as a meteoric impact site. His professors steered him toward marine geology. He became the founder and director of the Sea Floor Studies Section at the Naval Electronics Laboratory (1946-1963). He also achieved prominence by studying meteorite craters, both on Earth and on the moon and arguing that these impact craters were common. He died of a heart attack.

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