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Calculate the number 791

NUMBERMANIA: Calculate the number 791 using numbers [1, 5, 5, 3, 21, 767] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.

Correct answers: 2

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Teacher: Suppose, I give you 2...

Teacher: Suppose, I give you 2 dogs. Then I again give you 2 dogs. How many will you have?
Student: 5.
Teacher: How?
Student: I have a dog in my house now.

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Wilhelm Dörpfeld

Born 26 Dec 1853; died 25 Apr 1940 at age 86.German archaeologist who was the first to study the construction of ancient Greek theatres. He worked with Ernst Curtius as a member of the excavation team at the Olympia site in Greece (1877-81), where Dörpfeld developed the method of dating ancient archaeological sites based on the strata in which objects were found and the type of building materials. He excavated the Mycenaean palace at Tiryns, Greece (1884-85). He was an associate of the German archaeologist Heinrich Schliemann assisting in the search for the Harbour of Troy, at Hisarlik, Turkey (1882-83). Dörpfeld continued that work (1893-94) after Schliemann's death.«

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