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Calculate the number 9809

NUMBERMANIA: Calculate the number 9809 using numbers [7, 6, 2, 6, 21, 745] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.

Correct answers: 29

The first user who solved this task is Sanja Šabović.

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Cow and grass

Teacher: "I asked you to draw a cow and grass, but I only see a cow. Where is grass?"
Student: "The cow ate the grass, sir."

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Amanz Gressly

Born 17 Jul 1814; died 13 Apr 1865 at age 50.Swiss geologist and paleontologist who was a pioneer, and regarded by some as the founder, of paleogeography. He is known for his work identifyingstratigraphic facies (“aspects de terrain”) recognizing lateral regional variations in the character and fossil content of rock strata resulting from the environmental differences at the time of original deposition. This was a notable departure from the conventional geologists' study of vertical differences in strata. He wrote Observations Géologiques sur le Jura Soleurois on his studies of facies (a term he coined) he found in the Jura Mountains. His fossil collection had 25,000 specimens. He was appointed as an assistant to Louis Agassiz at Neuchâtel.The dinosaur Gresslyosaurus (“Gressly's lizard”) was so named in 1857 to honour him. (The name replaced the preoccupied Dinosaurus Ruetimeyer 1856).«

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