BRAIN TEASERS
The Most Difficult Tasks (page 417)

The Most Difficult Tasks (page 417)

puzzles, riddles, mathematical problems, mastermind, cinemania... These are the tasks listed 4161 to 4170.
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Calculate the number 3018

NUMBERMANIA: Calculate the number 3018 using numbers [5, 5, 4, 1, 55, 619] 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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#brainteasers #math #numbermania
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Calculate the number 1999

NUMBERMANIA: Calculate the number 1999 using numbers [3, 5, 6, 3, 27, 224] 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.
CHECK ANSWER
#brainteasers #math #numbermania
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Calculate the number 837

NUMBERMANIA: Calculate the number 837 using numbers [6, 2, 6, 2, 20, 775] 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.
CHECK ANSWER
#brainteasers #math #numbermania

A new hair salon opened up for...

A new hair salon opened up for business right across the street from the old established hair cutters' place.
They put up a big bold sign which read: "WE GIVE SEVEN DOLLAR HAIR CUTS!"
Not to be outdone, the old Master Barber put up his own sign: "WE FIX SEVEN DOLLAR HAIR CUTS!"
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Calculate the number 252

NUMBERMANIA: Calculate the number 252 using numbers [6, 6, 8, 7, 88, 990] 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.
CHECK ANSWER
#brainteasers #math #numbermania
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Calculate the number 858

NUMBERMANIA: Calculate the number 858 using numbers [5, 4, 5, 1, 38, 636] 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.
CHECK ANSWER
#brainteasers #math #numbermania
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Calculate the number 8427

NUMBERMANIA: Calculate the number 8427 using numbers [3, 9, 3, 8, 91, 950] 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.
CHECK ANSWER
#brainteasers #math #numbermania
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Calculate the number 7633

NUMBERMANIA: Calculate the number 7633 using numbers [7, 7, 8, 3, 33, 513] 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.
CHECK ANSWER
#brainteasers #math #numbermania
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Calculate the number 6220

NUMBERMANIA: Calculate the number 6220 using numbers [6, 6, 9, 8, 72, 764] 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.
CHECK ANSWER
#brainteasers #math #numbermania
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Calculate the number 2999

NUMBERMANIA: Calculate the number 2999 using numbers [6, 2, 5, 1, 97, 264] 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.
CHECK ANSWER
#brainteasers #math #numbermania
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Calculate the number 1034

NUMBERMANIA: Calculate the number 1034 using numbers [5, 7, 3, 9, 21, 952] 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.
CHECK ANSWER
#brainteasers #math #numbermania
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Giorgio Abetti

Born 5 Oct 1882; died 24 Aug 1982 at age 99.Italian astronomer known for his studies of the sun at the University of Padua where was director at the Arcetri Observatory (1921-52), taking over from his father who also held the post (1894-1921). In 1913, Giorgio Abetti took part, as a geodetic and geophysical astronomer, in the De Filippi expedition in Karakorum, Himalaya and Turkestan. He went on expeditions to observe eclipses of the sun, including one to Siberia to observe the total eclipse on 19 Jun 1936 and in 1952 to Sudan. With the advice of George Hale, he built a solar tower at the observatory (opened 1925). He wrote a popular text on the sun, a handbook of astrophysics (1936) and a popular history of astronomy (1963).
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